clients/Makefile.am: do not LDADD libnutclient.la to libnutclientstub.la, we use them both in ultimate test program linking

This reverts commit c5b34c7
"tests/Makefile.am: do not LDADD libnutclient.la where we (also) use libnutclientstub.la":
(on Linux) without the "extra" link we get
	  CXXLD    cppunittest
	/usr/bin/ld: cppunittest-nutclienttest.o: undefined reference to symbol '_ZTIN3nut12NutExceptionE'
	/usr/bin/ld: /home/runner/work/nut/nut/clients/.libs/libnutclient.so.2: error adding symbols: DSO missing from command line
	clang: error: linker command failed with exit code 1 (use -v to see invocation)

Signed-off-by: Jim Klimov <jimklimov+nut@gmail.com>

Author: jimklimov

clients/Makefile.am

@@ -163,7 +163,7 @@ if HAVE_CXX11
 # libnutclientstub version information and build
 libnutclientstub_la_SOURCES = nutclientmem.h nutclientmem.cpp
 libnutclientstub_la_LDFLAGS = -version-info 1:1:0
-libnutclientstub_la_LIBADD = libnutclient.la
+#libnutclientstub_la_LIBADD = libnutclient.la
 if HAVE_WINDOWS
   # Many versions of MingW seem to fail to build non-static DLL without this
   libnutclientstub_la_LDFLAGS += -no-undefined

tests/Makefile.am

@@ -145,11 +145,11 @@ TESTS += $(TESTS_CXX11)
 # Note: we only build it, but do not run directly (NIT prepares the sandbox)
 check_PROGRAMS += cppnit
 
-# NOTE: libnutclientstub includes libnutclient and adds nutclientmem
 cppunittest_CXXFLAGS = $(AM_CXXFLAGS) $(CPPUNIT_CFLAGS) $(CPPUNIT_CXXFLAGS) $(CPPUNIT_NUT_CXXFLAGS) $(CXXFLAGS)
 ###cppunittest_CXXFLAGS += -I$(top_srcdir)/include -DTOP_SRCDIR="\"$(top_srcdir)\""
 cppunittest_LDFLAGS = $(CPPUNIT_LDFLAGS) $(CPPUNIT_LIBS)
-cppunittest_LDADD   = $(top_builddir)/clients/libnutclientstub.la
+cppunittest_LDADD  = $(top_builddir)/clients/libnutclient.la
+cppunittest_LDADD += $(top_builddir)/clients/libnutclientstub.la
 cppunittest_SOURCES = $(CPPUNITTESTSRC) $(CPPUNITTESTERSRC)
 
 # Currently nutconf and related codebase causes woes for static analysis
@@ -161,7 +161,7 @@ endif WITH_NUTCONF
 
 cppnit_CXXFLAGS = $(AM_CXXFLAGS) $(CPPUNIT_CFLAGS) $(CPPUNIT_CXXFLAGS) $(CPPUNIT_NUT_CXXFLAGS) $(CXXFLAGS)
 cppnit_LDFLAGS = $(CPPUNIT_LDFLAGS) $(CPPUNIT_LIBS)
-cppnit_LDADD   = $(top_builddir)/clients/libnutclientstub.la
+cppnit_LDADD = $(top_builddir)/clients/libnutclient.la $(top_builddir)/clients/libnutclientstub.la
 cppnit_SOURCES = $(CPPCLIENTTESTSRC) $(CPPUNITTESTERSRC)
 
 # Make sure out-of-dir C++ dependencies exist (especially when dev-building