explicitly make debug available for tests

asn1c/tests/check-assembly.sh

@@ -40,8 +40,8 @@ cat > Makefile <<EOM
 # This file is autogenerated by ../$0
 
 COMMON_FLAGS= -I. -DEMIT_ASN_DEBUG
-CFLAGS=\${COMMON_FLAGS} ${CFLAGS}
-CXXFLAGS=\${COMMON_FLAGS} ${CXXFLAGS}
+CFLAGS = \${COMMON_FLAGS} ${CFLAGS} -g -O0
+CXXFLAGS = \${COMMON_FLAGS} ${CXXFLAGS}
 
 CC ?= ${CC}