windows: Fix detection of the llvm-rc resource compiler

By default, clang-cl based environments use rc.exe as resource
compiler. However, when cross compiling with clang-cl, one might
want to use llvm-rc instead.

Try to detect llvm-rc based on the output from "$CMD /?".

This requires a very recent llvm-rc; previosly, the output of
"/?" with llvm-rc was very generic and didn't explicitly indicate
that it actually was llvm-rc. This was changed in
bab6902eba
which will be included in the upcoming LLVM 17.0.0 release.

Contrary to the other regexes, don't include the preceding parts
of the line in the log printout, as it includes an unhelpful
"OVERVIEW:" prefix.

mesonbuild/modules/windows.py

@@ -97,6 +97,7 @@ class WindowsModule(ExtensionModule):
 
         for (arg, match, rc_type) in [
                 ('/?', '^.*Microsoft.*Resource Compiler.*$', ResourceCompilerType.rc),
+                ('/?', 'LLVM Resource Converter.*$', ResourceCompilerType.rc),
                 ('--version', '^.*GNU windres.*$', ResourceCompilerType.windres),
                 ('--version', '^.*Wine Resource Compiler.*$', ResourceCompilerType.wrc),
         ]: