[webkitgtk4/f22] Add upstream reference to recently added patch

[Tomas Popela]

commit 7988c8453925f62c43291445d66932ff911db96d
Author: Tomas Popela <tpopela at redhat.com>
Date:   Wed Feb 18 14:37:05 2015 +0100

    Add upstream reference to recently added patch

 webkitgtk4.spec |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/webkitgtk4.spec b/webkitgtk4.spec
index 8176951..6f27569 100644
--- a/webkitgtk4.spec
+++ b/webkitgtk4.spec
@@ -25,6 +25,7 @@ Patch4:         webkitgtk-2.7.90-180234.patch
 Patch5:         webkitgtk-2.7.90-180248.patch
 # https://bugs.webkit.org/show_bug.cgi?id=141618
 Patch6:         webkitgtk-2.7.90-180258.patch
+# http://trac.webkit.org/changeset/180264
 Patch7:         webkitgtk-2.7.90-bmalloc_static.patch
 
 BuildRequires:  at-spi2-core-devel