[geary] Add some git and deb build artefacts to .gitignore

[Michael Gratton <mjog src gnome org>]

commit 72f93d9cb3963bc36850eea31f44c1ddfd2d9733
Author: Michael James Gratton <mike vee net>
Date:   Fri May 13 11:52:24 2016 +1000

    Add some git and deb build artefacts to .gitignore

 .gitignore |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index 203812a..f6464f0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,9 +3,17 @@
 /Makefile
 /.stamp
 build/
+debian/*.debhelper.log
+debian/*.substvars
+debian/debhelper-build-stamp
+debian/files
+debian/geary
+debian/geary-dbg
 /geary
 /geary-mailer
 /geary-console
+*.diff
+*.patch
 *.xz
 *.swp
 bindings/vapi/gmime-2.6/gmime-2.6.gi