Add -lheimntlm to LDADD directly.
Add -lheimntlm to LDADD directly.

With the current binutils, symbols from libheimtlm.so are loaded because
it is referenced by DT_NEEDED.  This feature is not implemented in
mclinker (https://code.google.com/p/mclinker/issues/detail?id=104).
I encountered the same issue when linking with a recent devel/binutils
invoked via clang.  This was the only use of DT_NEEDED in the tree so
removing it simplifies toolchain requirements.

Submitted by:	Pete Chou <petechou@gmail.com> (mclinker issue)

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