gitignore: Ignore autofoo files *~

Change-Id: I64e433f2425dbe2b22103f986354939c0ac9d9f9
diff --git a/.gitignore b/.gitignore
index 2eee9cd..5b742e7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,6 +23,7 @@
 stamp-h1
 #libosmo-abis-*
 tests/*_test
+*~
 
 # libtool and e.g. arm-poky-linux-gnueabi-libtool
 *libtool