[automake] remove long time deprecated automake macros and variables which are removed finally in automake-1.13

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge pull request #2070 from sraue/automake-fixes

[automake] remove long time deprecated automake macros and variables whi...
Merge remote-tracking branch 'origin/master' into android-neon