Add -android-ndk-host linux-x86_64 parameter to android builds

This parameter is needed when using android-ndk-r8e

Change-Id: Id10bcec35739bdf3cab774922f01e1e4c784a40d
Reviewed-by: Simo Fält <simo.falt@digia.com>
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>