.gitignore update

headers_install by default puts headers into usr/include/ .
They're auto-generated, so should be ignored.

Same for *.orig, *.rej .

Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/usr/.gitignore b/usr/.gitignore
index be186a8..69b2e89 100644
--- a/usr/.gitignore
+++ b/usr/.gitignore
@@ -5,3 +5,4 @@
 initramfs_data.cpio
 initramfs_data.cpio.gz
 initramfs_list
+include