build: fix bash completion sourcing

Sourcing functions in files from a function within a file being
sourced was giving bash a hard time. This fixes 'repo' command tab
completions.

Change-Id: Iac1b3078e20749fb474ed1270e0886cf435e24d9
Kernel : Use SaberMod 4.7.4 Toolchain

Change-Id: If5ca3afefa0ab46d662bb97b75087320e45e8c8f
Rom : Use Linaro 4.8 Toolchain // Use -O3 for Optimization

Change-Id: I2536a57ef644a17a3fb06aeaca420a1fda43f224
Disable -Wunused-parameter

Change-Id: I4289c7d97d1d9694dd74f23d2e0fee07d2374e67