[utils] Add libc++ and libc++abi config to llvm-lit

This allows us to use bin/llvm-lit to run individual libc++ and
libc++abi tests without having to explicitly specify the site config
paths, similar to other projects.

Differential Revision: https://reviews.llvm.org/D28733

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292203 91177308-0d34-0410-b5e6-96231b3b80d8

utils/llvm-lit/llvm-lit.in

@@ -39,6 +39,16 @@ if os.path.exists(compilerrt_obj_root):
     builtin_parameters['compilerrt_site_basedir'] = \
             os.path.join(compilerrt_obj_root, 'test')
 
+libcxx_obj_root = os.path.join(llvm_obj_root, 'projects', 'libcxx')
+if os.path.exists(libcxx_obj_root):
+    builtin_parameters['libcxx_site_config'] = \
+        os.path.join(libcxx_obj_root, 'test', 'lit.site.cfg')
+
+libcxxabi_obj_root = os.path.join(llvm_obj_root, 'projects', 'libcxxabi')
+if os.path.exists(libcxxabi_obj_root):
+    builtin_parameters['libcxxabi_site_config'] = \
+        os.path.join(libcxxabi_obj_root, 'test', 'lit.site.cfg')
+
 if __name__=='__main__':
     from lit.main import main
     main(builtin_parameters)