dontdiff: update based on gitignore updates

Update dontdiff, based on .gitignore patches from Pete Zaitcev and Adrian
Bunk.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Documentation/dontdiff

@@ -42,6 +42,9 @@
 *.9.gz
 .*
 .cscope
+.gitignore
+.mailmap
+.mm
 53c700_d.h
 53c7xx_d.h
 53c7xx_u.h
@@ -175,11 +178,13 @@ times.h*
 tkparse
 trix_boot.h
 utsrelease.h*
+vdso.lds
 version.h*
 vmlinux
 vmlinux-*
 vmlinux.aout
-vmlinux.lds
+vmlinux*.lds*
+vmlinux*.scr
 vsyscall.lds
 wanxlfw.inc
 uImage