add ignores for gnu global artifacts

cowboyd · cowboyd · commit 82db08dc3b0a · 2015-07-13T18:47:31.000-05:00
diff --git a/.gitignore b/.gitignore
@@ -21,3 +21,6 @@ spec/reports
 test/tmp
 test/version_tmp
 tmp
+/GPATH
+/GRTAGS
+/GTAGS
