Fix a typo in compiler detection.

Bug 200553693

This is the beginning of a history rewrite annotation.
This is a rewrite of a commit originally made in submodule libcxx.
Original hash: 55bca6a7d4c342a8e7bb42c1832f85f4150c4677.

libcxx/utils/libcxx/compiler.py

@@ -89,7 +89,7 @@ def _initTypeAndVersion(self):
               major_ver = macros['__CUDACC_VER_MAJOR__']
               minor_ver = macros['__CUDACC_VER_MINOR__']
               patchlevel = macros['__CUDACC_VER_BUILD__']
-              if '__LIBCUDACXX_NVRTC_TEST__' in macro.keys():
+              if '__LIBCUDACXX_NVRTC_TEST__' in macros.keys():
                 self.is_nvrtc = True
           elif '__PGIC__' in macros.keys():
               compiler_type = "pgi"