test: Store path to the test executable in Test class

Store the path to the test executable, found in argv[0], in the Test
instance. This can be useful for tests that need to fork processes.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

test/process/process_test.cpp

@@ -9,7 +9,6 @@
 #include <unistd.h>
 #include <vector>
 
-
 #include <libcamera/base/event_dispatcher.h>
 #include <libcamera/base/thread.h>
 #include <libcamera/base/timer.h>
@@ -106,5 +105,7 @@ int main(int argc, char **argv)
 		return child.run(status);
 	}
 
-	return ProcessTest().execute();
+	ProcessTest test;
+	test.setArgs(argc, argv);
+	return test.execute();
 }