Problem: VMCI tests do not build

Solution: fix path in Makefile.am

Makefile.am

@@ -856,12 +856,12 @@ if HAVE_VMCI
 test_apps += test_pair_vmci test_reqrep_vmci
 
 test_pair_vmci_SOURCES = tests/test_pair_vmci.cpp
-test_pair_vmci_LDADD = libzmq.la
+test_pair_vmci_LDADD = src/libzmq.la
 test_pair_vmci_LDFLAGS = @LIBZMQ_VMCI_LDFLAGS@
 test_pair_vmci_CXXFLAGS = @LIBZMQ_VMCI_CXXFLAGS@
 
 test_reqrep_vmci_SOURCES = tests/test_reqrep_vmci.cpp
-test_reqrep_vmci_LDADD = libzmq.la
+test_reqrep_vmci_LDADD = src/libzmq.la
 test_reqrep_vmci_LDFLAGS = @LIBZMQ_VMCI_LDFLAGS@
 test_reqrep_vmci_CXXFLAGS = @LIBZMQ_VMCI_CXXFLAGS@