Exclude test files from the code coverage report

Link asn1c/tests with libasn1cskeletons.a in order to improve
skeletons coverage. When the skeleton files are copied the lcov will
report coverage for each copy separatly.

Makefile.am

@@ -2,6 +2,7 @@
 ACLOCAL_AMFLAGS = -I m4
 
 @CODE_COVERAGE_RULES@
+CODE_COVERAGE_IGNORE_PATTERN="tests/*" "lex.yy.c" "y.tab.c" "asn1p_l.l" "asn1p_y.y"
 
 SUBDIRS = 				\
 	libasn1parser libasn1fix	\

asn1c/tests/check-assembly.sh

@@ -54,7 +54,7 @@ cat > "$testdir/Makefile" <<EOM
 # This file is autogenerated by ../$0
 
 COMMON_FLAGS= -I.
-CFLAGS = \${COMMON_FLAGS} ${CFLAGS:-} -g -O0
+CFLAGS = \${COMMON_FLAGS} ${CFLAGS:-} -g -O0 -I ${abs_top_srcdir}/skeletons
 CPPFLAGS = -DSRCDIR=../${srcdir}
 CXXFLAGS = \${COMMON_FLAGS} ${CXXFLAGS}
 
@@ -63,12 +63,12 @@ CC ?= ${CC}
 all: check-executable
 check-executable: compiled-module *.c*
 	@rm -f *.core
-	\$(CC) \$(CPPFLAGS) \$(CFLAGS) -o check-executable *.c* -lm
+	\$(CC) \$(CPPFLAGS) \$(CFLAGS) -o check-executable *.c* -L${abs_top_builddir}/skeletons/.libs -lasn1cskeletons -lm
 
 # Compile the corresponding .asn1 spec.
 compiled-module: ${asn_module} ${abs_top_builddir}/asn1c/asn1c
 	${abs_top_builddir}/asn1c/asn1c		\\
-		-S ${abs_top_srcdir}/skeletons	\\
+		-S /tmp/do/not/copy/skeletons	\\
 		-Wdebug-compiler		\\
 		${AFLAGS} ${asn_module}
 	rm -f converter-sample.c