[clang] Add `.cjs` extension handling for JavaScript Language. (PR #118188)

[Owen Pan via cfe-commits]

================
@@ -87,7 +87,7 @@ static cl::opt<std::string> AssumeFileName(
              "supported:\n"
              "  CSharp: .cs\n"
              "  Java: .java\n"
-             "  JavaScript: .mjs .js .ts\n"
+             "  JavaScript: .cjs .mjs .js .ts\n"
----------------
owenca wrote:

```suggestion
             "  JavaScript: .js .mjs .cjs .ts\n"
```

https://github.com/llvm/llvm-project/pull/118188