add missing src/cc.c to liboauth2_sts_la_SOURCES for make check

Signed-off-by: Hans Zandbelt <hans.zandbelt@openidc.com>

Author: zandbelt

Makefile.am

@@ -23,6 +23,7 @@ liboauth2_sts_la_SOURCES = \
 	src/sts.c \
 	src/wstrust.c \
 	src/ropc.c \
+	src/cc.c \
 	src/otx.c \
 	src/jwt.c