Don't set $LIB if we're not targetting windows.
Don't set $LIB if we're not targetting windows.

Reviewers: timurrrr, samsonov

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D7739

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@230091 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt