They use $(TESTUTIL) and thus should use $(TESTUTIL_LIBS) too.
This fixes build failures on Fedora 13.
Closes #2006
lib1551_CPPFLAGS = $(AM_CPPFLAGS)
lib1552_SOURCES = lib1552.c $(SUPPORTFILES) $(TESTUTIL)
+lib1552_LDADD = $(TESTUTIL_LIBS)
lib1552_CPPFLAGS = $(AM_CPPFLAGS)
lib1553_SOURCES = lib1553.c $(SUPPORTFILES) $(TESTUTIL)
+lib1553_LDADD = $(TESTUTIL_LIBS)
lib1553_CPPFLAGS = $(AM_CPPFLAGS)
lib1900_SOURCES = lib1900.c $(SUPPORTFILES) $(TESTUTIL) $(WARNLESS)