arch/i486: enable AB_FLAGS_Y2038 for LFS

Author: Cyanoxygen

arch/i486.sh

@@ -6,7 +6,8 @@
 CFLAGS_COMMON_ARCH=('-O2' '-fno-tree-ch' '-ffunction-sections' '-fdata-sections' '-mno-omit-leaf-frame-pointer')
 LDFLAGS_COMMON_ARCH=('-Wl,--gc-sections')
 
-CPPFLAGS_COMMON_ARCH=('-D_TIME_BITS=64' '-D_FILE_OFFSET_BITS=64')
 CFLAGS_COMMON_ARCH+=('-march=i486' '-mtune=generic')
 
 RUSTFLAGS_COMMON_ARCH=('-Ctarget-cpu=i486' '-Clink-args=-latomic')
+
+AB_FLAGS_Y2038=1