glsl: Convert the tests directory to automake.

This runs optimization-test and produces the usual automake test
output, which may be interesting to automated build systems.

This doesn't convert the tests to be individually exposed to the
automake runner, because automake doesn't like wildcards (due to being
nonportable in make, not that we care).

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

Makefile

@@ -22,7 +22,7 @@ doxygen:
 	cd doxygen && $(MAKE)
 
 check:
-	cd src/glsl/tests/ && ./optimization-test
+	make -C src/glsl/tests check
 	make -C tests check
 
 clean:

configure.ac

@@ -2005,6 +2005,7 @@ AC_CONFIG_FILES([configs/autoconf
 		src/egl/wayland/wayland-egl/Makefile
 		src/egl/wayland/wayland-egl/wayland-egl.pc
 		src/egl/wayland/wayland-drm/Makefile
+		src/glsl/tests/Makefile
 		src/glx/Makefile
 		src/mapi/shared-glapi/Makefile
 		src/gtest/Makefile

src/glsl/tests/.gitignore

@@ -0,0 +1 @@
+Makefile

src/glsl/tests/Makefile.am

@@ -0,0 +1,2 @@
+TESTS = \
+	optimization-test