Replace hardcode_into_libs patches with sed calls in libgcrypt, libksba, libassuan

Replaces version-specific patches with build system sed commands to simplify
version upgrades. Verified identical binary output with baseline.

Changes:
- libgcrypt-1.10.1: Remove patch, use sed for hardcode_into_libs
- libksba-1.6.3: Remove patch, use sed for hardcode_into_libs
- libassuan-2.5.5: Remove patch, use sed for hardcode_into_libs
- gpg2-2.4.0: Refactor patch to only contain functional code change (ttyfp behavior)
  Move cross_compiling=yes to sed in module for future version bumps
- All modules: Add TODO comments for version bump considerations

Sed patterns follow tpm2-tss convention (simple string matching without anchors).

Build verification: EOL_x220-hotp-maximized compiles successfully with 175 KiB
free CBFS space. All GPG2 toolstack libraries built correctly with -Oz optimization.

Signed-off-by: Thierry Laurion <insurgo@riseup.net>

Author: tlaurion

modules/gpg2

@@ -15,7 +15,8 @@ gpg2_depends := libgpg-error libgcrypt libksba libassuan npth libusb $(musl_dep)
 
 #TODO: remove -std=gnu11 when bumping gpg2 version (current 2.4.0 has C23 compatibility issues with GCC 15.1.0 true keyword conflicts)
 gpg2_configure := \
-	$(CROSS_TOOLS) \
+	sed -i 's/cross_compiling=no/cross_compiling=yes/' configure \
+	&& $(CROSS_TOOLS) \
 	CFLAGS="-Oz -std=gnu11"  \
 	./configure \
 	CPPFLAGS="-I$(INSTALL)/include/libusb-1.0 -DDISABLE_PHOTO_VIEWER" \

modules/libassuan

@@ -1,13 +1,15 @@
 modules-$(CONFIG_GPG2) += libassuan
 
+#TODO: On version bump, check if hardcode_into_libs sed can be removed if configure script improves
 libassuan_version := 2.5.5
 libassuan_dir := libassuan-$(libassuan_version)
 libassuan_tar := libassuan-$(libassuan_version).tar.bz2
 libassuan_url := https://gnupg.org/ftp/gcrypt/libassuan/$(libassuan_tar)
 libassuan_hash := 8e8c2fcc982f9ca67dcbb1d95e2dc746b1739a4668bc20b3a3c5be632edb34e4
 
 libassuan_configure := \
-	CFLAGS="-Oz" \
+	sed -i 's/hardcode_into_libs=yes/hardcode_into_libs=no/g' configure \
+	&& CFLAGS="-Oz" \
 	$(CROSS_TOOLS) \
 	./configure \
 	--host $(MUSL_ARCH)-linux-musl \

modules/libgcrypt

@@ -1,13 +1,15 @@
 modules-$(CONFIG_GPG2) += libgcrypt
 
+#TODO: On version bump, check if hardcode_into_libs sed can be removed if configure script improves
 libgcrypt_version := 1.10.1
 libgcrypt_dir := libgcrypt-$(libgcrypt_version)
 libgcrypt_tar := libgcrypt-$(libgcrypt_version).tar.bz2
 libgcrypt_url := https://gnupg.org/ftp/gcrypt/libgcrypt/$(libgcrypt_tar)
 libgcrypt_hash := ef14ae546b0084cd84259f61a55e07a38c3b53afc0f546bffcef2f01baffe9de
 
 libgcrypt_configure := \
-	$(CROSS_TOOLS) \
+	sed -i 's/hardcode_into_libs=yes/hardcode_into_libs=no/g' configure \
+	&& $(CROSS_TOOLS) \
 	CFLAGS="-Oz"  \
 	./configure \
 	--host=$(MUSL_ARCH)-linux-musl \

modules/libgpg-error

@@ -1,5 +1,6 @@
 modules-$(CONFIG_GPG2) += libgpg-error
 
+#TODO: On version bump, check if PowerPC64LE lock object creation is still needed in patches/libgpg-error-1.46.patch
 libgpg-error_version := 1.46
 libgpg-error_dir := libgpg-error-$(libgpg-error_version)
 libgpg-error_tar := libgpg-error-$(libgpg-error_version).tar.bz2

modules/libksba

@@ -1,13 +1,15 @@
 modules-$(CONFIG_GPG2) += libksba
 
+#TODO: On version bump, check if hardcode_into_libs sed can be removed if configure script improves
 libksba_version := 1.6.3
 libksba_dir := libksba-$(libksba_version)
 libksba_tar := libksba-$(libksba_version).tar.bz2
 libksba_url := https://gnupg.org/ftp/gcrypt/libksba/$(libksba_tar)
 libksba_hash := 3f72c68db30971ebbf14367527719423f0a4d5f8103fc9f4a1c01a9fa440de5c
 
 libksba_configure := \
-	$(CROSS_TOOLS) \
+	sed -i 's/hardcode_into_libs=yes/hardcode_into_libs=no/g' configure \
+	&& $(CROSS_TOOLS) \
 	CFLAGS="-Oz" \
 	./configure \
 	--host $(MUSL_ARCH)-linux-musl \

patches/gpg2-2.4.0.patch

@@ -1,15 +1,4 @@
-diff -u --recursive gnupg-2.4.0/configure gnupg-2.4.0/configure
---- gnupg-2.4.0/configure	2016-08-17 09:20:25.000000000 -0400
-+++ gnupg-2.4.0/configure	2018-01-20 16:55:14.502067084 -0500
-@@ -572,7 +572,7 @@
- ac_clean_files=
- ac_config_libobj_dir=.
- LIBOBJS=
--cross_compiling=no
-+cross_compiling=yes
- subdirs=
- MFLAGS=
- MAKEFLAGS=
+diff -u --recursive gnupg-2.4.0/common/ttyio.c.orig gnupg-2.4.0/common/ttyio.c
 --- gnupg-2.4.0/common/ttyio.c.orig	2023-03-24 02:37:40.384435064 +0100
 +++ gnupg-2.4.0/common/ttyio.c	2023-03-24 02:38:21.825961221 +0100
 @@ -186,7 +186,7 @@