[bazel] Add missing dependency for 3219fb0

Author: d0k

utils/bazel/llvm-project-overlay/clang/unittests/BUILD.bazel

@@ -336,6 +336,7 @@ cc_test(
         ":ast_matchers_tests_hdrs",
         "//clang:ast",
         "//clang:ast_matchers",
+        "//clang:basic",
         "//clang:frontend",
         "//clang:lex",
         "//clang:parse",