This patch ensures that programs which depend on x11 are not build if x11
is not available.

Signed-off-by: Spenser Gilliland <spenser@gillilanding.com>
---
Index: mesa3d-demos-8.1.0/src/egl/opengles2/Makefile.am
===================================================================
--- mesa3d-demos-8.1.0.orig/src/egl/opengles2/Makefile.am
+++ mesa3d-demos-8.1.0/src/egl/opengles2/Makefile.am
@@ -35,9 +35,10 @@ AM_LDFLAGS = \
 
 if HAVE_EGL
 if HAVE_GLESV2
-bin_PROGRAMS = \
+bin_PROGRAMS = es2gears_screen
+if HAVE_X11
+bin_PROGRAMS += \
 	es2_info \
-	es2gears_screen \
 	es2gears_x11 \
 	es2tri
 if HAVE_WAYLAND
@@ -45,6 +46,7 @@ bin_PROGRAMS += es2gears_wayland
 endif
 endif
 endif
+endif
 
 es2_info_LDADD = $(X11_LIBS)
 es2tri_LDADD = $(X11_LIBS)