build-sys: ignore .patch, .orig and .swp files
diff --git a/.gitignore b/.gitignore
index cb76932..6040bb1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,9 @@
 *~
 *.bak
 *.o
+*.orig
+*.patch
+*.swp
 .deps
 .libs
 Makefile