[PATCH] NoAA does not initialize TargetLibraryInfo

[Tobias Güntner]

Hi!

I encountered a bug while implementing an AliasAnalysis. Basically, I 
passed the previous AA in the chain (which happened to be NoAA) to a 
helper function which returned a wrong result because 
getTargetLibraryInfo() was NULL.

With this patch, NoAA also initializes its TLI and all AAs in the chain 
use the same DataLayout and TargetLibraryInfo. (Patch is against 3.4, 
but should be straightforward to port.)

Regards,
Tobias
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