* gnu/packages/python.scm (python): Update from 3.3.5 to 3.4.3.
* gnu/packages/patches/python-fix-tests.patch: Update the required test fixes.
* gnu/packages/patches/python-libffi-mips-n32-fix.patch: Remove it...
* gnu-system.am (dist_patch_DATA): ... and do not reference it here.