[gparted] Add .dirstamp to .gitignore

[Curtis Gedak <gedakc src gnome org>]

commit 576d0f7cbf5a8ef61840f17315e8c7b3f66d7a65
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Mon Aug 21 08:14:11 2017 +0100

    Add .dirstamp to .gitignore
    
    Automake build of libraries creates .dirstamp files.  First added by
    this commit:
        81b104928b35d46faf200dc3265ac2254b6246c5
        Add building of Google Test libraries (#781978)
    
    Mark .dirstamp as to be ignored by GIT.

 .gitignore |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index a2db572..21aa5e1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,6 +12,7 @@
 .cproject
 .csettings
 .deps
+.dirstamp
 .intltool-merge-cache
 .libs
 .project