get_maintainer.pl: Add an ignore list for git history

As Pali Rohár has asked to not be copied on changes to files he is not
a specific maintainer of, add his address to .get_maintainer.ignore.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>
diff --git a/.gitignore b/.gitignore
index 3a4d056..002f95d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -53,6 +53,7 @@
 #
 !.gitignore
 !.mailmap
+!.get_maintainer.*
 
 #
 # Generated files