gitignore: add libflashrom.a

Change-Id: I9258a1710780df5c6a7c864de246ebbe850d60fe
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.com>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/62826
Original-Reviewed-by: Felix Singer <felixsinger@posteo.net>
Original-Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Original-Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/73476
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/.gitignore b/.gitignore
index b824e15..dedcfa1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,7 @@
 /flashrom-*
 /flashrom.exe
 /flashrom.8
+/libflashrom.a
 /libflashrom-doc/
 /versioninfo.inc