.gitignore updates

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/Documentation/video4linux/.gitignore b/Documentation/video4linux/.gitignore
new file mode 100644
index 0000000..9527039
--- /dev/null
+++ b/Documentation/video4linux/.gitignore
@@ -0,0 +1 @@
+v4lgrab