linux: update to linux-3.15.8
Merge pull request #3389 from pershoot/staging

linux: update to linux-3.15.8
xbmc: update to xbmc-14-dc75ad6, update FM support patch

Signed-off-by: Stephan Raue <stephan@openelec.tv>
gdb: update to gdb-7.8

Signed-off-by: Stephan Raue <stephan@openelec.tv>
binutils: remove unused cloog and ppl support for now

Signed-off-by: Stephan Raue <stephan@openelec.tv>
gcc: remove unused cloog and ppl support for now

Signed-off-by: Stephan Raue <stephan@openelec.tv>
remove package 'ppl'

Signed-off-by: Stephan Raue <stephan@openelec.tv>
remove package 'cloog'

Signed-off-by: Stephan Raue <stephan@openelec.tv>