[PATCH] Fix `llvm-config` to emit the linker flag for the combined shared object built by autoconfig/make instead of the individual components.

[JF Bastien]

IIUC this is a problem when a toolchain is built with autoconf with dynamic libraries, and only ships the dynamic libraries (not the intermediate `.a` files). A regular build of LLVM has these `.a` files and aggregates all of them into the `.so`, so a toolchain would be silly to distribute the `.a` files because they're redundant.

This change seems useful, but I'd defer to folks such as @echristo who know better than I what LLVM's build system expects.


REPOSITORY
  rL LLVM

http://reviews.llvm.org/D10716

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