Fix a silly bug in the JavaHL native implementation of DiffOptions.

[in subversion/bindings/javahl/native]
* DiffOptions.cpp (get_diff_options_flags): Actually store the retreived
   field ID of the DiffOptions.flags Java class member.
   Don't make assumptions about types -- use jint instead of int.

* DiffOptions.h, DiffOptions.cpp (DiffOptions):
   Don't make assumptions about types -- use jint instead of int.

[in subversion/bindings/javahl/tests/org/apache/subversion/javahl]
* BasicTests.java (BasicTests.testDiffOptions):
   Enable a previoiusly failing hunk of test.

[in subversion/bindings/javahl/src/org/apache/subversion/javahl]
* types/DiffOptions.java: Add missing trailing newline.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1456328 13f79535-47bb-0310-9956-ffa450edef68