contrib: kate: update to 0.4.3

From 0.4.3:

• Fixed --enable-valgrind configure option.
• Corrected self testing on 64 bit architectures and plug test memory leak.
• Adjusted leftover bits for Python 3.

From 0.4.2:

• Adjusted built to only install KateDJ when wxpython and oggz is available.
• Adjusted decoder to allow zero sized metadata content.
• Adjusted text parsing to better recognize invalid UNICODE, and add test case for it.
• Eliminated timing precision issues in writing to kate format, and ensured seconds are written with a leading 0 if less than 10
• Updated/rewrote autoconf/automake setup to work with current versions.
• Fix compiler warning about possible clobbering of FILE pointer. (#124 (closed))
• Fixes several other compiler warnings.
• Added x32 support to tests/check_sizes.c.
• Corrected option handling in KateDJ.
• Adust kate_high_decode_init() to avoid use after free.
• Updated doxygen setup using doxygen -u to avoid warnings from current doxygen version.
• Cleaned up and extended documentation a bit.
• Migrated KateDJ code from python 2 to 3. (#123 (closed))