patch 8.1.0861: building with MinGW and static libc doesn't work

Problem:    Building with MinGW and static libc doesn't work.
Solution:   Change the LIB argument. (Ken Takata)

src/Make_cyg_ming.mak

@@ -931,7 +931,8 @@ endif
 ifeq (yes, $(USE_STDCPLUS))
 LINK = $(CXX)
 ifeq (yes, $(STATIC_STDCPLUS))
-LIB += -static-libstdc++ -static-libgcc
+#LIB += -static-libstdc++ -static-libgcc
+LIB += -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
 endif
 else
 LINK = $(CC)

src/version.c

@@ -783,6 +783,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    861,
 /**/
     860,
 /**/