scripts/patchreview: tighten patch detection

Only look in recipes-* folders for patches, to stop finding patches in
e.g. meta/lib/oeqa/manual.

(From OE-Core rev: ed912e10c61ea9d45ca648e03eebafeebcf7e9b0)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/contrib/patchreview.py

@@ -203,7 +203,7 @@ if __name__ == "__main__":
 
     if args.directory:
         os.chdir(args.directory)
-    patches = subprocess.check_output(("git", "ls-files", "*.patch", "*.diff")).decode("utf-8").split()
+    patches = subprocess.check_output(("git", "ls-files", "recipes-*/**/*.patch", "recipes-*/**/*.diff")).decode("utf-8").split()
     results = patchreview(patches)
     analyse(results, want_blame=args.blame, verbose=args.verbose)
     if args.histogram: