webkit-gtk: work around Make bug by re-running make

webkit-gtk: work around Make bug by re-running make

GNU make 3.82 has a bug where it drops required dependencies.
https://bugs.webkit.org/show_bug.cgi?id=79498 is the WebKitGTK+
bug, and http://savannah.gnu.org/bugs/?30653 is the GNU Make bug.

Work around this by running make again if it fails just in case the failure is
due to the bug.

Based on a patch by Andreas Müller <schnitzeltony@googlemail.com>.

[ YOCTO #2816 ]

(From OE-Core rev: af5bdc8ca413d6cabeb4f4b4c5836912a17f28be)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>