[Patch] Add TargetLibraryInfo in LTO passes builder

[Yi Jiang]

Thank you for your comments.  Could anybody else also comment on this? Thx. 
On Dec 9, 2013, at 4:39 PM, "Duncan P. N. Exon Smith" <dexonsmith at apple.com> wrote:

> On Dec 9, 2013, at 3:52 PM, Yi Jiang <yjiang at apple.com> wrote:
> 
>> Thank you for the clarification. Here is the patch with test case. 
>> <lto.libinfo.patch>
> 
> This looks right to me.
> 
> Bill, you’re listed as code owner for LTO.  Was there a good reason TargetLibraryInfo wasn’t being set before?