Properly include $*_LIB_PATH in makefile.unix

src/makefile.unix

@@ -7,7 +7,7 @@ USE_UPNP:=0
 DEFS=-DNOPCH
 
 DEFS += $(addprefix -I,$(CURDIR) $(BOOST_INCLUDE_PATH) $(BDB_INCLUDE_PATH) $(OPENSSL_INCLUDE_PATH))
-LIBS += $(addprefix -l,$(BOOST_LIB_PATH) $(BDB_LIB_PATH) $(OPENSSL_LIB_PATH))
+LIBS = $(addprefix -L,$(BOOST_LIB_PATH) $(BDB_LIB_PATH) $(OPENSSL_LIB_PATH))
 
 LMODE = dynamic
 LMODE2 = dynamic
@@ -21,7 +21,7 @@ else
 endif
 
 # for boost 1.37, add -mt to the boost libraries
-LIBS= \
+LIBS += \
  -Wl,-B$(LMODE) \
    -l boost_system$(BOOST_LIB_SUFFIX) \
    -l boost_filesystem$(BOOST_LIB_SUFFIX) \