Go: Changed function alignment to 16 bytes for Power

Go: Changed function alignment to 16 bytes for Power

I just added a simple, but important change for Power. In order to eliminate inefficiencies in the iBuffer, all functions are now aligned to 16 bytes.

This opens a new future work line to add an alignment directive in the assembler, so we can properly align loops in the compiler and when writing code in assembly.

Committed as 09b71d5.

by Carlos Eduardo Seo