Namespace xorg-gtest header filenames

Due to the default automake compilation flags including -I. -I.., it is
possible to pick up an xorg-gtest header like device.h instead of a
project header. Namespacing the headers should resolve this issue. Users
should be including xorg-gtest.h instead of individual headers, so this
should not cause compilation failures.
Signed-off-by: Chase Douglas <chase.douglas@canonical.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>

include/Makefile.am

@@ -24,8 +24,8 @@
 #
 
 nobase_include_HEADERS = \
-	xorg/gtest/environment.h \
-	xorg/gtest/process.h \
-	xorg/gtest/test.h \
-	xorg/gtest/evemu/device.h \
+	xorg/gtest/xorg-gtest_environment.h \
+	xorg/gtest/xorg-gtest_process.h \
+	xorg/gtest/xorg-gtest_test.h \
+	xorg/gtest/evemu/xorg-gtest_device.h \
 	xorg/gtest/xorg-gtest.h

include/xorg/gtest/xorg-gtest.h

@@ -25,10 +25,10 @@
  *
  ******************************************************************************/
 
-#include "environment.h"
-#include "process.h"
-#include "test.h"
+#include "xorg-gtest_environment.h"
+#include "xorg-gtest_process.h"
+#include "xorg-gtest_test.h"
 
 #ifdef HAVE_EVEMU
-#include "evemu/device.h"
+#include "evemu/xorg-gtest_device.h"
 #endif