tcmalloc: add long form flag '--exe' to specify the binary

This change was originally made as part of CL
https://codereview.chromium.org/2730473002

BUG=724399,b:70905156

Change-Id: I33ee28eac4dab6077cf162358cf4c10b41c0f6a2
Reviewed-on: https://chromium-review.googlesource.com/1147667
Reviewed-by: Will Harris <wfh@chromium.org>
Reviewed-by: Albert J. Wong <ajwong@chromium.org>
Commit-Queue: Gabriel Marin <gmx@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578087}
1 file changed