buildroot

subversion: bump to version 1.9.2

- Bump to version 1.9.2.
- Update the hash file.
- Use a tar.bz2 tarball to save space and bandwidth.
- Fix a typo in the berkeley-db configure option.
- Remove non-existent configure options: neon, gssapi and ssl.
- Remove neon dependency: is not needed to build subversion.
- Tweak the 0001-dont-mangle-cflags.patch for the 1.9.2 version and to
  patch configure.ac instead of configure.
- Add a new 0002-disable-macos-specific-features.patch to remove a
  configure check for Mach-O (and two more) which breaks the build when
  cross-compiling.
- Enable autoreconf since we are patching the configure.ac.

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>