[gn build] Manually port 44de2bb

Author: aeubanks

llvm/utils/gn/secondary/clang/include/clang/Config/BUILD.gn

@@ -27,6 +27,7 @@ write_cmake_config("Config") {
     "ENABLE_LINKER_BUILD_ID=",
     "ENABLE_X86_RELAX_RELOCATIONS=1",
     "CLANG_ENABLE_OBJC_REWRITER=1",  # FIXME: flag?
+    "CLANG_ENABLE_CIR=",
     "CLANG_SYSTEMZ_DEFAULT_ARCH=z10",
     "PPC_LINUX_DEFAULT_IEEELONGDOUBLE=",
   ]

llvm/utils/gn/secondary/clang/test/BUILD.gn

@@ -48,6 +48,7 @@ write_lit_config("lit_site_cfg") {
     "CLANG_BUILT_STANDALONE=0",
     "CLANG_DEFAULT_CXX_STDLIB=",  # Empty string means "default value" here.
     "CLANG_DEFAULT_PIE_ON_LINUX=0",
+    "CLANG_ENABLE_CIR=0",
     "CLANG_PLUGIN_SUPPORT=0",  # FIXME: Analysis/plugins need global -fPIC
     "CURRENT_TOOLS_DIR=" + rebase_path("$root_out_dir/bin", dir),
     "CLANG_VENDOR_UTI=org.llvm.clang",