Initialize the EHFrameSection pointer to zero.

This should fix the spurious buildbot errors.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135594 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCObjectFileInfo.cpp b/lib/MC/MCObjectFileInfo.cpp
index cdf225a..5540b55 100644
--- a/lib/MC/MCObjectFileInfo.cpp
+++ b/lib/MC/MCObjectFileInfo.cpp
@@ -454,6 +454,7 @@
   CommDirectiveSupportsAlignment = true;
   SupportsWeakOmittedEHFrame = true;
   IsFunctionEHFrameSymbolPrivate = true;
+  EHFrameSection = 0;
 
   Triple T(TT);
   Triple::ArchType Arch = T.getArch();