Log Message:
Fix libjxr on big endian systems and fix warnings

Add patches from FreeBSD ports that fix build warnings.
For the patches to apply correctly, add conversion to unix style linebreaks.
Define _BIG__ENDIAN_ on big endian systems to make the package behave
correctly when running on them. As pointed out in jxrlibs makefile.
Bump pkgrevision and abi depends due to the big endian change.