gmp: update to gmp-5.1.3

Signed-off-by: Stephan Raue <stephan@openelec.tv>
llvm: update to llvm-3.4

Signed-off-by: Stephan Raue <stephan@openelec.tv>
openssl: update to openssl-1.0.1f

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libXfont: update to libXfont-1.4.7

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