sstorage: fix unused parameter error messages

Fix errors when trying to build the secure storage host application
using AOSP.

  error: unused parameter 'argc' [-Werror,-Wunused-parameter]
  error: unused parameter 'argv' [-Werror,-Wunused-parameter]

Signed-off-by: Joakim Bech <joakim.bech@linaro.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
diff --git a/secure_storage/host/main.c b/secure_storage/host/main.c
index 64b9fae..6aea19d 100644
--- a/secure_storage/host/main.c
+++ b/secure_storage/host/main.c
@@ -166,7 +166,7 @@
 
 #define TEST_OBJECT_SIZE	7000
 
-int main(int argc, char *argv[])
+int main(void)
 {
 	struct test_ctx ctx;
 	char obj1_id[] = "object#1";		/* string identification for the object */