Changed version processing for modules.

auto/modules/ruby

@@ -91,8 +91,23 @@ if [ $nxt_found = no ]; then
     exit 1;
 fi
 
-NXT_RUBY_VERSION=`$NXT_RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG["RUBY_PROGRAM_VERSION"])'`
-$echo " + Ruby version: ${NXT_RUBY_VERSION}"
+
+nxt_feature="Ruby version"
+nxt_feature_name=""
+nxt_feature_run=value
+nxt_feature_incs="${NXT_RUBY_INCPATH}"
+nxt_feature_libs="${NXT_RUBY_LIBS}"
+nxt_feature_test="
+    #include <ruby.h>
+    #include <ruby/version.h>
+
+    int main() {
+        printf(\"%s\", ruby_version);
+        return 0;
+    }"
+
+. auto/feature
+
 
 if grep ^$NXT_RUBY_MODULE: $NXT_MAKEFILE 2>&1 > /dev/null; then
     $echo