gn-runtime: Fix build when using llvm runtime

Signed-off-by: Khem Raj <[email protected]>

Author: kraj

meta-chromium/recipes-browser/chromium/gn-native_92.0.4515.107.bb

@@ -28,6 +28,11 @@ BUILD_LD = "${CXX}"
 BUILD_AR = "llvm-ar"
 
 DEPENDS = "clang-native ninja-native"
+DEPENDS_append_runtime-llvm = " compiler-rt-native libcxx-native"
+# Use libcxx headers for native parts
+CXXFLAGS_append_runtime-llvm = " -isysroot=${STAGING_DIR_NATIVE} -stdlib=libc++"
+# Use libgcc for native parts
+LDFLAGS_append_runtime-llvm = " -rtlib=libgcc -unwindlib=libgcc -stdlib=libc++ -lc++abi -rpath ${STAGING_LIBDIR_NATIVE}"
 
 do_configure[noexec] = "1"