aarch64: Make the function pointer tables position independent

This allows running the code on android, where 64 bit binaries with
text relocations aren't allowed to be loaded.

Signed-off-by: Martin Storsjö <martin@martin.st>
Merge commit 'c00365b46d464ce47716315c1801818d811bdb9a'

* commit 'c00365b46d464ce47716315c1801818d811bdb9a':
  aarch64: Make the function pointer tables position independent

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avfilter/vf_tinterlace: remove unused variable

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>