configure.in: use quadrigraphs

* configure.in (RUBY_DEFINT): use quadrigraphs instead of bare
  hash signs not to comment out closing parenthesis.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53806 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

configure.in

@@ -2034,7 +2034,7 @@ if test "${rb_cv_type_$1}" != no; then
 			[RUBY_CHECK_SIZEOF([$1], [$2], [], [AC_INCLUDES_DEFAULT([$4])])])
     else
 	AC_DEFINE_UNQUOTED($1, [$rb_cv_type_$1])
-	AC_DEFINE_UNQUOTED([SIZEOF_]AS_TR_CPP($1), [SIZEOF_]AS_TR_CPP([${rb_cv_type_$1##unsigned }]))
+	AC_DEFINE_UNQUOTED([SIZEOF_]AS_TR_CPP($1), [SIZEOF_]AS_TR_CPP([${rb_cv_type_$1@%:@@%:@unsigned }]))
     fi
 fi
 ])