tests: s/assert/igt_assert

Just a wholesale rollout for now, we can refine later on.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

tests/gem_ctx_create.c

@@ -58,7 +58,7 @@ int main(int argc, char *argv[])
 		fprintf(stderr, "%s\n", strerror(errno));
 		exit(EXIT_FAILURE);
 	}
-	assert(create.ctx_id != 0);
+	igt_assert(create.ctx_id != 0);
 
 	close(fd);