fstab.tenderloin: Better performance through fstab

Change-Id: Ie5dd45341cc5f70d2298da73a326e52594b2ba15
Add WiFi driver load delay.

This lets the ath6kl driver load. We need this one second delay.
Thanks to the suggestion of Conn O'Griofa we don't need to
patch hardware/libhardware_legacy.

Change-Id: I1ac3e6f6fff3a7fce5878dfc5ffae5400036398f
BoardConfig.mk: Toolchain updates

Use a new 4.7 toolchain optimized for A8 (the tenderloin cpu-arch)

Use 4.9 toolchain for platform.

Change-Id: Ibc474f244cb2017033de39d151301ad101b2b867