git: Ignore vi files (.swp, .swo)
diff --git a/.gitignore b/.gitignore
index c77c750..4a709a7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,3 +50,7 @@
 
 src/crc*gen.c
 include/osmocom/core/crc*gen.h
+
+
+# vi files
+*.sw?