rstrtmgr: Add RmShutdown stub.

dlls/rstrtmgr/main.c

@@ -100,3 +100,12 @@ DWORD WINAPI RmEndSession(DWORD handle)
     FIXME("%u stub!\n", handle);
     return ERROR_CALL_NOT_IMPLEMENTED;
 }
+
+/***********************************************************************
+ * RmShutdown (rstrtmgr.@)
+ */
+DWORD WINAPI RmShutdown(DWORD handle, ULONG flags, RM_WRITE_STATUS_CALLBACK status)
+{
+    FIXME("%u, 0x%08x, %p stub!\n", handle, flags, status);
+    return ERROR_CALL_NOT_IMPLEMENTED;
+}

dlls/rstrtmgr/rstrtmgr.spec

@@ -8,5 +8,5 @@
 @ stub RmRemoveFilter
 @ stub RmReserveHeap
 @ stdcall RmRestart(long long ptr)
-@ stub RmShutdown
+@ stdcall RmShutdown(long long ptr)
 @ stdcall RmStartSession(ptr long ptr)

include/restartmanager.h

@@ -64,6 +64,8 @@ typedef struct {
     BOOL bRestartable;
 } RM_PROCESS_INFO, *PRM_PROCESS_INFO;
 
+typedef void (CDECL *RM_WRITE_STATUS_CALLBACK)(UINT);
+
 #ifdef __cplusplus
 }
 #endif