msm8976-common: Set sys.usb.ffs.aio_compat

The kernel does not support aio with ffs.
Set the property so adb/mtp know to use the compatible
functions, and the same while in recovery.

Bug: 37916658
Test: Use adb / use adb in recovery
Change-Id: Id35a05fcb9952dcf7239bd15a61cc620537419bc

rootdir/etc/init.qcom.usb.rc

@@ -35,6 +35,7 @@ on boot
     write /sys/class/android_usb/android0/f_rndis/vendorID 05C6
     write /sys/class/android_usb/android0/f_rndis/manufacturer ${ro.product.manufacturer}
     setprop persist.sys.usb.config.extra none
+    setprop sys.usb.ffs.aio_compat 1
 
 on charger
     setprop sys.usb.config mass_storage