[m-rev.] asm_fast grades on OS X / x86_64

[Julien Fischer]

On Tue, 2 Sep 2014, Julien Fischer wrote:

> This diff is fairly insignificant, however it has allowed me to
> bootcheck the compiler in the asm_fast.gc grade on OS X, which to the
> best of my knowledge is the first time that has ever worked.  I'll do (a
> lot) more testing of the asm_fast grades on OS X, and if they work
> properly enable them.

I have now bootchecked the compiler in the following asm_fast grades on
OS X / x86_64:

    asm_fast.par.gc
    asm_fast.gc.trseg
    asm_fast.gc.stseg
    asm_fast.gc.profdeep
    asm_fast.gc.decldebug
    asm_fast.gc

They all work with the exception of parallel conjucntion not working
in asm_fast.par.gc due to the function sem_init not doing anything useful 
on OS X.
(I've also tried asm_fast.gc / asm_fast.gc.trseg out on G12 and that
works as well.)

I'll commit a change shortly that enables the asm_fast grades on OS X
provided that an appropriate C compiler is being used.

Cheers,
Julien.