patch 8.2.0100: macros for Ruby are too complicated

Problem:    Macros for Ruby are too complicated.
Solution:   Do not use DYNAMIC_RUBY_VER, use RUBY_VERSION. (Ken Takata,
            closes #5452)
diff --git a/src/auto/configure b/src/auto/configure
index 9930495..1b5094e 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -7622,7 +7622,7 @@
 	  fi
 	  $as_echo "#define DYNAMIC_RUBY 1" >>confdefs.h
 
-	  RUBY_CFLAGS="-DDYNAMIC_RUBY_DLL=\\\"$libruby_soname\\\" -DDYNAMIC_RUBY_VER=$rubyversion $RUBY_CFLAGS"
+	  RUBY_CFLAGS="-DDYNAMIC_RUBY_DLL=\\\"$libruby_soname\\\" $RUBY_CFLAGS"
 	  RUBY_LIBS=
 	fi
       else