scripts/git.orderfile: Match QAPI schema more precisely

Pattern *.json also matches the tests/qapi-schema/*.json.  Separates
them from the tests/qapi-schema/*.{err,exit,out} in diffs.  I hate
that.  Change the pattern to match just the "real" QAPI schemata.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190913201349.24332-2-armbru@redhat.com>

scripts/git.orderfile

@@ -19,11 +19,11 @@ Makefile*
 *.mak
 
 # qapi schema
-*.json
+qapi/*.json
+qga/*.json
 
 # headers
 *.h
 
 # code
 *.c
-