XQuartz: Re-enable rlAccel

It was incorrectly blamed for some crashes a few months ago, and it should be
safe to use until we get an EXA driver to replace it.

hw/xquartz/mach-startup/Makefile.am

@@ -18,6 +18,7 @@ X11_bin_LDADD = \
 	$(top_builddir)/hw/xquartz/xpr/libXquartzXpr.la \
 	$(top_builddir)/dix/dixfonts.lo \
 	$(top_builddir)/miext/rootless/librootless.la \
+	$(top_builddir)/miext/rootless/accel/librlAccel.la \
 	$(top_builddir)/hw/xquartz/pbproxy/libxpbproxy.la \
 	$(DARWIN_LIBS) $(XSERVER_LIBS) $(XSERVER_SYS_LIBS) -lXplugin
 

hw/xquartz/xpr/xprScreen.c

@@ -364,9 +364,7 @@ xprSetupScreen(int index, ScreenPtr pScreen)
 {
     // Initialize accelerated rootless drawing
     // Note that this must be done before DamageSetup().
-
-    // These are crashing ugly... better to be stable and not crash for now.
-    //RootlessAccelInit(pScreen);
+    RootlessAccelInit(pScreen);
 
 #ifdef DAMAGE
     // The Damage extension needs to wrap underneath the