Link libcommon.la with $(COMMON_LIBS).

Link libcommon.la with $(COMMON_LIBS).

This hopefully fixes link errors on Solaris:

  CCLD     test_utils_vl_lookup
Undefined			first referenced
 symbol  			    in file
kstat_data_lookup                   daemon/.libs/libcommon.a(common.o)
kstat_lookup                        daemon/.libs/libcommon.a(common.o)
kstat_read                          daemon/.libs/libcommon.a(common.o)
getaddrinfo                         daemon/.libs/libcommon.a(common.o)
freeaddrinfo                        daemon/.libs/libcommon.a(common.o)
gai_strerror                        daemon/.libs/libcommon.a(common.o)
ld: fatal: symbol referencing errors. No output written to test_utils_vl_lookup
collect2: error: ld returned 1 exit status