fix: address review comments in CMakeLists.txt

- Remove redundant Chinese comment '# 非 Debug 模式下添加 -O3' (keep English only)
- Fix full-width comma (U+FF0C) to ASCII comma in RELRO note comment
- Remove target_link_options(CGE PRIVATE -fPIE -fPIC -pie): these flags are
  inappropriate/redundant for a SHARED library; CMake handles -fPIC automatically

Author: wysaid

library/src/main/jni/CMakeLists.txt

@@ -80,12 +80,11 @@ endif()
 
 target_compile_definitions(CGE PUBLIC ANDROID_NDK=1 CGE_LOG_TAG=\"libCGE\" CGE_TEXTURE_PREMULTIPLIED=1 _CGE_DISABLE_GLOBALCONTEXT_=1 _CGE_ONLY_FILTERS_=1)
 
-# 非 Debug 模式下添加 -O3
 # Add -O3 in non-Debug mode
 target_compile_options(CGE PRIVATE $<$<NOT:$<CONFIG:Debug>>:-O3>)
 
-# Note: -Wl,-z,relro,-z,now is intentionally omitted here， fixing issue: <https://github.com/wysaid/android-gpuimage-plus/issues/562>
-target_link_options(CGE PRIVATE -fPIE -fPIC -pie)
+# Note: -Wl,-z,relro,-z,now is intentionally omitted here, fixing issue: <https://github.com/wysaid/android-gpuimage-plus/issues/562>
+# Android API 23+ enforces full RELRO by default; no explicit linker hardening flags are needed.
 
 target_link_libraries(CGE PUBLIC
     GLESv2