intel-gpu-tools: add igt_core init func calls to some tests

igt-core.h/c provides some macros and initialisation
functions to support the tests but some of the single
tests do not use these. Modifying these tests to use
the igt_simple_main macro and igt_simple_init function
is the first step towards a consistent command line
across all tests.

Signed-off-by: Tim Gore <tim.gore@intel.com>
Signed-off-by: Thomas Wood <thomas.wood@intel.com>

tests/gem_bad_batch.c

@@ -56,7 +56,7 @@ bad_batch(void)
 	intel_batchbuffer_flush(batch);
 }
 
-int main(int argc, char **argv)
+igt_simple_main
 {
 	int fd;
 
@@ -72,6 +72,4 @@ int main(int argc, char **argv)
 	drm_intel_bufmgr_destroy(bufmgr);
 
 	close(fd);
-
-	return 0;
 }