iris: Alphabetize source files after iris_perf.c was added

src/gallium/drivers/iris/meson.build

@@ -37,9 +37,9 @@ files_libiris = files(
   'iris_formats.c',
   'iris_genx_macros.h',
   'iris_genx_protos.h',
+  'iris_monitor.c',
   'iris_perf.h',
   'iris_perf.c',
-  'iris_monitor.c',
   'iris_performance_query.c',
   'iris_pipe.h',
   'iris_pipe_control.c',