freedreno/ir3: Free the compiler at the end of the unit tests.

Needed for meson test with asan enabled.

Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7936>

src/freedreno/ir3/tests/delay.c

@@ -218,5 +218,7 @@ main(int argc, char **argv)
 		ir3_shader_destroy(shader);
 	}
 
+	ir3_compiler_destroy(c);
+
 	return result;
 }