libinit_falcon: Make standalone

From dhacker29/android_device_motorola_moto_msm8960@9e418b1c6c4a843b7abfa26cbdd3af8a78d0a85a
Needs https://gerrit.omnirom.org/#/c/5390/

Change-Id: Ica4e46bf15d58270c0503a15fe0cb1c3613616ef