Add debian/patches/git_test-simplify-use-bash.patch from upstream

debian/patches/git_test-simplify-use-bash.patch

@@ -0,0 +1,22 @@
+From e0d72c537699227992fc72599e59eefbbb209a8f Mon Sep 17 00:00:00 2001
+From: Matthias Clasen <mclasen@redhat.com>
+Date: Sun, 20 Sep 2015 12:17:12 -0400
+Subject: test-simplify: Explicitly use bash
+
+The script uses bash features, after all.
+
+https://bugzilla.gnome.org/show_bug.cgi?id=755274
+
+diff --git a/testsuite/tools/test-simplify.in b/testsuite/tools/test-simplify.in
+index 2de4366..6b4f2e8 100755
+--- a/testsuite/tools/test-simplify.in
++++ b/testsuite/tools/test-simplify.in
+@@ -1,4 +1,4 @@
+-#! /bin/sh
++#! /bin/bash
+ 
+ GTK_BUILDER_TOOL=${GTK_BUILDER_TOOL:-gtk-builder-tool}
+ TEST_DATA_DIR=${TEST_DATA_DIR:-./simplify}
+-- 
+cgit v0.10.2
+