[PING][PR67476] Add param parloops-schedule

[Tom de Vries]

Hi,

These two patches:
- https://gcc.gnu.org/ml/gcc-patches/2015-09/msg00938.html
- https://gcc.gnu.org/ml/gcc-patches/2015-09/msg00940.html
add a param parloop-schedule=<static|dynamic|guided|auto|runtime>.

Thanks,
- Tom