mlen authored May 17, 2016 and Ben Gamari committed May 18, 2016

This patch fixes Cmm generation required to produce histograms when
compiling with -ticky flag, strips dead code from rts/Ticky.c and
reworks it to use a shared constant in both C and Haskell code.

Fixes #8308.

Test Plan: T8308

Reviewers: jstolarek, simonpj, austin

Reviewed By: simonpj

Subscribers: mpickering, simonpj, bgamari, mlen, thomie, jstolarek

Differential Revision: https://phabricator.haskell.org/D931

GHC Trac Issues: #8308