debian/rules: FreeRDP2 does not build against oss4's alsa layer. Thus, deactivating alsa support on non-linux hosts.
debian/rules: FreeRDP2 does not build against oss4's alsa layer. Thus, deactivating alsa support on non-linux hosts.

bmiklautz/debian-freerdp2,bmiklautz/debian-freerdp2,bmiklautz/debian-freerdp2,bmiklautz/debian-freerdp2,bmiklautz/debian-freerdp2,bmiklautz/debian-freerdp2