Bug 1359427 - Hide top-level gecko.log from VCSes; r=gps

gecko.log is generated by several test harnesses.  It sometimes gets added
as part of patches that are sent out for review.  By ignoring the file,
we can prevent it from being uploaded to mozreview.

MozReview-Commit-ID: CYApQOnZJfa

--HG--
extra : rebase_source : d1e03daad26104dec8b08451b82ed673f505fa5b

.gitignore

@@ -35,6 +35,9 @@ security/manager/.nss.checkout
 # Build directories
 /obj*/
 
+# gecko.log is generated by various test harnesses
+/gecko.log
+
 # Build directories for js shell
 _DBG.OBJ/
 _OPT.OBJ/

.hgignore

@@ -32,6 +32,9 @@
 # Build directories
 ^obj
 
+# gecko.log is generated by various test harnesses
+^gecko\.log
+
 # Build directories for js shell
 _DBG\.OBJ/
 _OPT\.OBJ/