[Options] Store the owning OptTable in Option so it can construct Group and Alias.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165150 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/OptTable.cpp b/lib/Driver/OptTable.cpp
index a6d3cb3..680ea99 100644
--- a/lib/Driver/OptTable.cpp
+++ b/lib/Driver/OptTable.cpp
@@ -134,13 +134,7 @@
 }
 
 Option *OptTable::CreateOption(unsigned id) const {
-  const Info &info = getInfo(id);
-  const Option *Group = getOption(info.GroupID);
-  const Option *Alias = getOption(info.AliasID);
-
-  Option *Opt = new Option(&info, Group, Alias);
-
-  return Opt;
+  return new Option(&getInfo(id), this);
 }
 
 Arg *OptTable::ParseOneArg(const ArgList &Args, unsigned &Index) const {