Fixed the way we allocate executable memory on behalf of the JIT.  We don't need it to be writable since we are using special APIs to write into it.
Fixed the way we allocate executable memory on
behalf of the JIT.  We don't need it to be writable
since we are using special APIs to write into it.

<rdar://problem/13599185>


git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@179077 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb