gcc-changelog: temporarily disable check_line_start

contrib/ChangeLog:

	* gcc-changelog/git_commit.py: Temporarily disable
	check_line.start.
diff --git a/contrib/gcc-changelog/git_commit.py b/contrib/gcc-changelog/git_commit.py
index 3bd6710..59f9680 100755
--- a/contrib/gcc-changelog/git_commit.py
+++ b/contrib/gcc-changelog/git_commit.py
@@ -615,6 +615,8 @@
                 self.errors.append(Error(msg, entry.parentheses_stack[-1]))
 
     def check_line_start(self):
+        # FIXME: temporarily disable
+        return
         for entry in self.changelog_entries:
             for line in entry.lines:
                 if line.startswith('\t '):