libgcrypt: convert to new package format

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libgcrypt: update to libgcrypt-1.5.3

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libssh: convert to new package format

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libssh: update to libssh-0.5.5

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libgcrypt: fix package script

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