patch 8.0.1741: MS-Windows with msys2 cannot build Ruby statically

Problem:    MS-Windows with msys2 cannot build Ruby statically.
Solution:   Add RUBY_VERSION to CFLAGS later. (Gray Wolf, closes #2833)

src/Make_cyg_ming.mak

@@ -458,7 +458,6 @@ RUBYINC += -I $(RUBY)/include/ruby-$(RUBY_API_VER_LONG) -I $(RUBY)/include/ruby-
endif
ifeq (no, $(DYNAMIC_RUBY))
RUBYLIB = -L$(RUBY)/lib -l$(RUBY_INSTALL_NAME)
CFLAGS += -DRUBY_VERSION=$(RUBY_VER)
endif

endif # RUBY
@@ -538,6 +537,9 @@ ifeq (yes, $(DYNAMIC_RUBY))
CFLAGS += -DDYNAMIC_RUBY -DDYNAMIC_RUBY_DLL=\"$(RUBY_INSTALL_NAME).dll\"
CFLAGS += -DDYNAMIC_RUBY_VER=$(RUBY_VER)
endif
ifeq (no, $(DYNAMIC_RUBY))
CFLAGS += -DRUBY_VERSION=$(RUBY_VER)
endif
ifneq ($(findstring w64-mingw32,$(CC)),)
# A workaround for MinGW-w64
CFLAGS += -DHAVE_STRUCT_TIMESPEC -DHAVE_STRUCT_TIMEZONE

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =

static int included_patches[] =
{   /* Add new patch number below this line */
/**/
    1741,
/**/
    1740,
/**/