Shared path is gone and site dir is not there by default.

Author: headius

core/src/main/java/org/jruby/runtime/load/LoadService.java

@@ -229,7 +229,10 @@ public void init(List prependDirectories) {
             if (jrubyHome != null) {
                 // siteDir has to come first, because rubygems insert paths after it
                 // and we must to prefer Gems to rubyLibDir/rubySharedLibDir (same as MRI)
-                addPath(RbConfigLibrary.getSiteDir(runtime));
+                String siteDir = RbConfigLibrary.getSiteDir(runtime);
+                if (new File(siteDir).exists()) {
+                    addPath(siteDir);
+                }
                 // if vendorDirGeneral is different than siteDirGeneral,
                 // add vendorDir, too
                 // adding {vendor,site}{Lib,Arch}Dir dirs is not necessary,
@@ -241,8 +244,6 @@ public void init(List prependDirectories) {
                 if (rubygemsDir != null) {
                     addPath(rubygemsDir);
                 }
-                addPath(RbConfigLibrary.getRubySharedLibDir(runtime));
-                // TODO: merge
                 addPath(RbConfigLibrary.getRubyLibDir(runtime));
             }