Add spi-hdlc-adapter to Android.mk
Add spi-hdlc-adapter to Android.mk

spi-hdlc-adapter will now be built along with wpantund and wpanctl.

abtink/wpantund,abtink/wpantund,abtink/wpantund,abtink/wpantund,openthread/wpantund,openthread/wpantund,openthread/wpantund,openthread/wpantund