fix(cmake): point bundled JNI headers to repo-root .github/include after the llama/ move

The C++ compile failed on every native job with `fatal error: jni.h: No such
file or directory`. The bundled JNI headers live in .github/include/ at the repo
ROOT, but CMakeLists.txt now runs inside the llama/ module, so the relative
`.github/include/unix` resolved to the non-existent llama/.github/include/unix.
Anchor it to ${CMAKE_CURRENT_SOURCE_DIR}/../.github/include/{unix,windows} so it
points at the repo root regardless of build CWD. Covers Linux, macOS and Windows
(all use the bundled headers). The other CMakeLists paths use
${CMAKE_SOURCE_DIR}/… which already resolves inside llama/.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Rt1paYztGJ2AKUuBuAGDXE

Author: claude

llama/CMakeLists.txt

@@ -277,10 +277,13 @@ endif()
 
 # include jni.h and jni_md.h
 if(NOT DEFINED JNI_INCLUDE_DIRS)
+    # The bundled JNI headers live in .github/include/ at the REPO ROOT, one level above
+    # this module (the core moved into llama/). Anchor to the parent of the CMake source
+    # dir so the path is correct regardless of the build CWD.
     if(OS_NAME MATCHES "^Linux" OR OS_NAME STREQUAL "Mac" OR OS_NAME STREQUAL "Darwin")
-        set(JNI_INCLUDE_DIRS .github/include/unix)
+        set(JNI_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/../.github/include/unix)
     elseif(OS_NAME STREQUAL "Windows")
-        set(JNI_INCLUDE_DIRS .github/include/windows)
+        set(JNI_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/../.github/include/windows)
     # if we don't have provided headers, try to find them via Java
     else()
         find_package(Java REQUIRED)