gitignore: Add *.a

Since we're using thin archives now, we should ignore all the *.as lying
around...

Fixes: f6159cf ("build: use thin archives rather than incremental linking")
Signed-off-by: Andrew Donnellan <[email protected]>
Signed-off-by: Stewart Smith <[email protected]>

Author: ajdlinux

.gitignore

@@ -1,4 +1,5 @@
 *~
+*.a
 *.o
 *.d
 *.gcda