matchbox-wm: Update to fix XChangeProperty datatype issue

This brings us to master HEAD and adds a single commit
compared to the previous version:
  8178e70 ewmh: Fix data type of a few XChangeProperty calls

This fixes broken Home-button in matchbox panel on mips64 (and
probably other platforms).

[YOCTO #9284]

(From OE-Core rev: b5ed789a6fe2d395b74a073c28060eb0f5a04a1b)

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

meta/recipes-graphics/matchbox-wm/matchbox-wm_git.bb

@@ -10,7 +10,7 @@ LIC_FILES_CHKSUM = "file://src/wm.h;endline=21;md5=a7e844465edbcf79c282369f93caa
 SECTION = "x11/wm"
 DEPENDS = "libmatchbox virtual/libx11 libxext libxrender startup-notification expat gconf libxcursor libxfixes"
 
-SRCREV = "29544f0e61cc281fc60061443a537271e1081b78"
+SRCREV = "8178e70d5c742c4cd63b51df228cc8aa3594d518"
 PV = "1.2+git${SRCPV}"
 
 SRC_URI = "git://git.yoctoproject.org/matchbox-window-manager \