[PATCH] Add PIC-level support in LLVM, and implement it for PowerPC

[Justin Hibbits]

>>! In D5252#11, @joerg wrote:
> Any reason for introducing the "default" level and not just go with large? I think that what's almost all software is using anyway.

I modeled it after the -relocation-model option.  By allowing architecture defaults, the default for any given architecture can change without modifying any other arch.

http://reviews.llvm.org/D5252