build: Correctly put boost at end of LDADD
build: Correctly put boost at end of LDADD

This fixes linking issues when statically linking
(thanks @imwuzhh).

Infernoman/crowncoin,syscoin/syscoin,domob1812/crowncoin,syscoin/syscoin,Infernoman/crowncoin,Crowndev/crowncoin,syscoin/syscoin,Infernoman/crowncoin,Crowndev/crowncoin,syscoin/syscoin,Crowndev/crowncoin,Crowndev/crowncoin,domob1812/crowncoin,Infernoman/crowncoin,Infernoman/crowncoin,Infernoman/crowncoin,syscoin/syscoin,domob1812/crowncoin,domob1812/crowncoin,domob1812/crowncoin,Crowndev/crowncoin,Crowndev/crowncoin,domob1812/crowncoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin