Multiple Drive Letters Fix

This fixes the issue where multiple drive letters appear when connecting the phone to pc
Make kernel compatible with gcc <=4.8

Use export TARGET_GCC=4.8 before compiling with a 4.8 toolchain

Signed-off-by: Paul Beeler <sparksco@gmail.com>

Change-Id: I4ed5ad5dcf777003e25cfdf7f447493180781cc1
net:bluetooth:l2 cap core GCC 4.8 patch