try to fix code coverage building

src/tools/Makefile.am

@@ -24,13 +24,16 @@ include Makefile.inc
 LDADD = $(top_builddir)/src/lib/libcares.la
 
 ahost_SOURCES = ahost.c $(SAMPLESOURCES) $(SAMPLEHEADERS)
-ahost_CFLAGS = $(AM_CFLAGS)
-ahost_CPPFLAGS = $(AM_CPPFLAGS)
+ahost_CFLAGS = $(AM_CFLAGS) $(CODE_COVERAGE_CFLAGS)
+ahost_CPPFLAGS = $(AM_CPPFLAGS) $(CODE_COVERAGE_CPPFLAGS)
+ahost_LIBS = $(CODE_COVERAGE_LIBS)
 
 adig_SOURCES = adig.c $(SAMPLESOURCES) $(SAMPLEHEADERS)
-adig_CFLAGS = $(AM_CFLAGS)
-adig_CPPFLAGS = $(AM_CPPFLAGS)
+adig_CFLAGS = $(AM_CFLAGS) $(CODE_COVERAGE_CFLAGS)
+adig_CPPFLAGS = $(AM_CPPFLAGS) $(CODE_COVERAGE_CPPFLAGS)
+adig_LIBS = $(CODE_COVERAGE_LIBS)
 
 acountry_SOURCES = acountry.c $(SAMPLESOURCES) $(SAMPLEHEADERS)
-acountry_CFLAGS = $(AM_CFLAGS)
-acountry_CPPFLAGS = $(AM_CPPFLAGS)
+acountry_CFLAGS = $(AM_CFLAGS) $(CODE_COVERAGE_CFLAGS)
+acountry_CPPFLAGS = $(AM_CPPFLAGS) $(CODE_COVERAGE_CPPFLAGS)
+acountry_LIBS = $(CODE_COVERAGE_LIBS)