[commit: nofib] master: add missing import (07a9396)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/nofib

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/07a93962fa89ec58059c07d4f430645a486423c6/nofib

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commit 07a93962fa89ec58059c07d4f430645a486423c6
Author: Gabor Greif <ggreif at gmail.com>
Date:   Thu Dec 28 16:11:40 2017 +0100

    add missing import


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07a93962fa89ec58059c07d4f430645a486423c6
 gc/cacheprof/Main.hs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gc/cacheprof/Main.hs b/gc/cacheprof/Main.hs
index ab9998c..7964034 100644
--- a/gc/cacheprof/Main.hs
+++ b/gc/cacheprof/Main.hs
@@ -34,6 +34,7 @@ import Data.Char
 import Data.List
 import System.IO
 import System.Environment
+import System.Exit
 import Arch_x86
 import Generics