[PATCH] Revert "sim: mn10300: drop unused sim-main.c"

[Mike Frysinger <vapier@gentoo.org>]

This reverts commit 681a422b855e4b20086554b170dae051361f00c7.

I missed that this was included via common/sim-inline.c.  I thought
I had grepped the top of the tree, but I must have only done mn10300.

Add a comment to make it clear where/how this file is used.
---
 sim/mn10300/sim-main.c | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 sim/mn10300/sim-main.c

diff --git a/sim/mn10300/sim-main.c b/sim/mn10300/sim-main.c
new file mode 100644
index 000000000000..99a5c846c0d7
--- /dev/null
+++ b/sim/mn10300/sim-main.c
@@ -0,0 +1,9 @@
+/**
+ * This isn't normally compiled, but is pulled in via sim-inline.c when the
+ * SIM_MAIN_INLINE option is enabled by the user at compile time.
+ */
+
+#ifndef SIM_MAIN_C
+#define SIM_MAIN_C
+#include "op_utils.c"
+#endif
-- 
2.39.0