lib/core: add interactive debug point to igt_fail

Useful for inspecting the screen state in kms tests when they fail.

Also move the screen clearing in kms_cursor_crc to the bottom.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

lib/igt_core.c

@@ -918,6 +918,8 @@ void igt_fail(int exitcode)
 {
 	assert(exitcode != IGT_EXIT_SUCCESS && exitcode != IGT_EXIT_SKIP);
 
+	igt_debug_wait_for_keypress("failure");
+
 	if (!failed_one)
 		igt_exitcode = exitcode;