Package all of Xorg/X11/XCB (#1740)

* Updates to Mesa and other Xorg packages

* Add packages for all Xorg Protocol extensions

* Add packages for first half of Xorg libraries

* Add packages for remaining Xorg libraries

* Add packages for all Xorg utilities

* Add packages for Xorg documentation tools

* Add build deps to Xorg protocol headers

* Add packages for XCB

* Add build deps to Xorg libraries

* Add build deps to Xorg utilities

* Add packages for Xorg fonts and font-related utilities

* Change font deptype from build to default

I wasn't sure which deptype was appropriate at first since none of
the packages are actually linked together. I initially chose the
build deptype for this reason. However, the font packages don't
install into their own prefix. They install into font-config. If
font-config is a build dependency, that means you can uninstall it
without uninstalling the font packages, which wouldn't make sense
since they install into font-config. So I switched them back to
the default deptype.

* Minor formatting changes to ncview

* Add half-way done xorg-server package

* Add packages for Xorg test suites, not yet tested!

* Add packages for Xorg data

* Add first quarter of Xorg apps

* Add more packages for Xorg apps

* Add dependencies to mesa

* Remove comments from mesa package

* Flake8

* Add more packages for Xorg apps

* Add more packages for Xorg apps

* Add more packages for Xorg apps

* Add more packages for Xorg apps

* Add more packages for Xorg apps

* Add package for Sublime Text

* Add packages for remaining Xorg apps

* Revisit testing packages, add missing dependencies

* Add dependencies, clean up FIXMEs

var/spack/repos/builtin/packages/libxshmfence/package.py

@@ -26,16 +26,24 @@
 
 
 class Libxshmfence(Package):
-    """This is a tiny library that exposes a event API on top of Linux
-    futexes."""
+    """libxshmfence - Shared memory 'SyncFence' synchronization primitive.
 
-    homepage = "http://keithp.com/blogs/dri3_extension/"  # not really...
+    This library offers a CPU-based synchronization primitive compatible
+    with the X SyncFence objects that can be shared between processes
+    using file descriptor passing."""
+
+    homepage = "https://cgit.freedesktop.org/xorg/lib/libxshmfence/"
     url      = "http://xorg.freedesktop.org/archive/individual/lib/libxshmfence-1.2.tar.gz"
 
     version('1.2', 'f0b30c0fc568b22ec524859ee28556f1')
 
+    depends_on('xproto', type='build')
+    depends_on('pkg-config@0.9.0:', type='build')
+    depends_on('util-macros', type='build')
+
     def install(self, spec, prefix):
-        configure("--prefix=%s" % prefix)
+        configure('--prefix={0}'.format(prefix))
 
         make()
-        make("install")
+        make('check')
+        make('install')