Fix string merging with -split-sections

Authored by olsner on Dec 16 2016, 11:14 AM.

Description

Fix string merging with -split-sections

The added flags for string literal merging ended up printed in the
middle of the section name when -split-sections was enabled. Break it up
to put the flags after the name.

Test Plan: validate with SplitSections=YES

Reviewers: austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D2865

GHC Trac Issues: Trac #9577