add more files to the .gitignore list

This includes editor temp files, patch rejects, and other build/debug
artifacts.

Change-Id: I06c52dc36568baae73c1981034f1adf3ede87a82
Signed-off-by: Vernon Mauery <vernon.mauery@intel.com>
diff --git a/.gitignore b/.gitignore
index 8e4dc30..53f37f1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -64,3 +64,13 @@
 /fru-read-gen.cpp
 /app/*.lo
 /channel-gen.cpp
+
+# ignore vim swap files
+.*.sw*
+# failures from patch
+*.orig
+*.rej
+# backup files from some editors
+*~
+.cscope/
+build/