Don't include cogl/cogl.h from test-utils.h

There was a circular depedency when building from a fresh git clone
where test-fixtures needs to be built before the cogl directory, but
test-fixtures also indirectly includes cogl-enum-types.h which is only
generated when building the cogl directory. If we change the header to
just include specific cogl headers instead of cogl/cogl.h then we can
break the circular dependency.

This needs a tweak to test-no-gl-header because that first undefines
COGL_COMPILATION before including test-utils.h. However it doesn't
really do any actual work so we can get away without including it.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit adb26bd13a48ed571ef4cae4de005e039b34e361)

test-fixtures/test-utils.c

@@ -1,6 +1,5 @@
 #include <config.h>
 
-#include <cogl/cogl.h>
 #include <stdlib.h>
 
 #include "test-unit.h"

test-fixtures/test-utils.h

@@ -1,7 +1,10 @@
 #ifndef _TEST_UTILS_H_
 #define _TEST_UTILS_H_
 
-#include <cogl/cogl.h>
+#include <cogl/cogl-context.h>
+#include <cogl/cogl-onscreen.h>
+#include <cogl/cogl-offscreen.h>
+#include <cogl/cogl-texture-2d.h>
 #include <glib.h>
 
 /* We don't really care about functions that are defined without a

tests/conform/test-no-gl-header.c

@@ -1,18 +1,16 @@
 #undef COGL_COMPILATION
 #include <cogl/cogl.h>
 
-#include "test-utils.h"
-
 /* If you just include cogl/cogl.h, you shouldn't end up including any
    GL headers */
 #ifdef GL_TRUE
 #error "Including cogl.h shouldn't be including any GL headers"
 #endif
 
+void test_no_gl_header (void);
+
 void
 test_no_gl_header (void)
 {
-  if (cogl_test_verbose ())
-    g_print ("OK\n");
 }
 

tests/unit/test-unit-main.c

@@ -3,6 +3,7 @@
 #include <gmodule.h>
 
 #include <test-fixtures/test-unit.h>
+#include <stdlib.h>
 
 int
 main (int argc, char **argv)