tools: Fix usage of LDFLAGS and LDADD.
tools: Fix usage of LDFLAGS and LDADD.

Signed-off-by: orbea <52a4f580b1b0397f0d979f154ce0a2b6bcd4c920@riseup.net>

libimobiledevice/libimobiledevice,libimobiledevice/libimobiledevice