gitignore: Add GNU GLOBAL files to top .gitignore

Ignore GPATH, GRTAGS, GSYMS, and GTAGS generated by GNU GLOBAL.

Signed-off-by: Jani Nikula <[email protected]>
Signed-off-by: Sam Ravnborg <[email protected]>

Author: Jani Nikula

.gitignore

@@ -63,6 +63,12 @@ series
 cscope.*
 ncscope.*
 
+# gnu global files
+GPATH
+GRTAGS
+GSYMS
+GTAGS
+
 *.orig
 *~
 \#*#