[PATCH] fix configure problem with libfd requireing libz

[Dave N. <dc...@us...>]

Oops forgot to attach the patch.
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The latest binutils depends on libz for compression.  This patch adds 
the -lz to the list of libraries to link the -lbfd configure test 
against which will be searched if necessary.  This should continue to 
work for older binutils as well.

Signed-off-by: Dave Nomura  <dc...@us...>

-- 
Dave Nomura
LTC Linux Power Toolchain