Revert "Merge pull request #287 from MasterDuke17/master"

This reverts commit 62d0dba, reversing
changes made to ca37f08.

Rakudo's IO::Path relies on absolute paths returned from nextfiledir, and since
we cannot emulate the solution moar uses in IO::Path (because Java does not
support changing the CWD, at least not without platform-dependent hacks) we
will have to accept this inconsistency until someone rewrites IO::Path. This
reverts the failure mode for install-core-dist.pl on Rakudo-j back to
"setcodeobj can only be used with a CodeRef", from leaking a Java-level
NoSuchFileException.

Author: peschwa

src/vm/jvm/runtime/org/perl6/nqp/runtime/Ops.java

@@ -1214,7 +1214,7 @@ public static String nextfiledir(SixModelObject obj, ThreadContext tc) {
                 IOHandleInstance ioh = (IOHandleInstance)obj;
                 if (ioh.dirstrm != null && ioh.diri != null) {
                     if (ioh.diri.hasNext()) {
-                        return ioh.diri.next().getFileName().toString();
+                        return ioh.diri.next().toString();
                     } else {
                         return null;
                     }