Add the /profile flag to linker options for official builds.

Add the /profile flag to linker options for official builds.

This deposits "FIXUPS" in the PDB, which grows the PDB file by 5% or so, but
does not otherwise affect the generated binaries.

We are applying this change to branch 648 because it is one of the reference
branches we have been using in Syzygy development. It will be useful for us to
continue to be able to develop against this branch in order to compare
performance against earlier versions of our toolchain.

For more information refer to:

http://codereview.chromium.org/7106002

BUG=none
TEST=none

[chrisha, 2011-06-21 19:04:58]

PTAL

[Sigurður Ásgeirsson, 2011-06-21 19:08:13]

lgtm, but let's wait for the go-ahead from Laforge.

[laforge, 2011-06-21 19:13:55]

On 2011/06/21 19:08:13, Ruðrugis wrote:
> lgtm, but let's wait for the go-ahead from Laforge.

LGTM

[Sigurður Ásgeirsson, 2011-06-21 20:14:27]

On 2011/06/21 19:13:55, laforge wrote:
> On 2011/06/21 19:08:13, Ruðrugis wrote:
> > lgtm, but let's wait for the go-ahead from Laforge.
> 
> LGTM

Committed as http://codereview.chromium.org/7219015.