ignore *.patch files

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

.gitignore

@@ -25,6 +25,7 @@
 *.elf
 *.bin
 *.gz
+*.patch
 
 #
 # Top-level generic files