Build Debian packages with RandR support

Add libxrandr-dev to build-depends.

debian/changelog

@@ -31,6 +31,8 @@ wmaker (0.92.0+git-0) unstable; urgency=low
   * Implement the switch from SelectWindowsMouseButton et al. to
     MouseLeftButtonAction = SelectWindows from WindowMaker 0.65 in Debian's
     customized defaults. Closes: #116963
+  * Add libxrandr-dev to build-depends, enabling automatic wmaker restart on
+    resolution changes.
   * Built from wmaker-crm fork.
     Includes these patches for these issues:
     + display corruption on non 24bpp displays. Closes: #514438

debian/control

@@ -6,7 +6,8 @@ Standards-Version: 3.8.0.1
 Build-Depends: debhelper (>= 7.0.15), automake, gettext, dctrl-tools,
  libfontconfig1-dev, libjpeg-dev, libpng12-dev, libsm-dev, libtiff4-dev,
  libtool, libgif-dev, libx11-dev, libxext-dev, libxft-dev, libxinerama-dev,
- libxkbfile-dev, libxpm-dev, libxt-dev, libxrender-dev, sharutils, libxmu-dev
+ libxkbfile-dev, libxpm-dev, libxt-dev, libxrender-dev, sharutils, libxmu-dev,
+ libxrandr-dev
 Homepage: http://www.windowmaker.info/
 
 Package: wmaker