[hwcrypto] turn fake HWKEY and HWRNG warnings into messages.

Warnings prevent adding -Werror.

Change-Id: Ie7a2310461aa3de0a3a6953a2172d0aa6bcd93d7
diff --git a/hwcrypto/hwkey_srv_fake_provider.c b/hwcrypto/hwkey_srv_fake_provider.c
index 3c88880..363a20f 100644
--- a/hwcrypto/hwkey_srv_fake_provider.c
+++ b/hwcrypto/hwkey_srv_fake_provider.c
@@ -36,7 +36,7 @@
 #define LOCAL_TRACE  1
 #define LOG_TAG      "hwkey_fake_srv"
 
-#warning "Compiling FAKE HWKEY provider"
+#pragma message "Compiling FAKE HWKEY provider"
 
 /*
  *  This module is a sample only. For real device, this code
diff --git a/hwcrypto/hwrng_srv_fake_provider.c b/hwcrypto/hwrng_srv_fake_provider.c
index 19c5dd2..61d1a86 100644
--- a/hwcrypto/hwrng_srv_fake_provider.c
+++ b/hwcrypto/hwrng_srv_fake_provider.c
@@ -25,7 +25,7 @@
 #define LOCAL_TRACE  1
 #define LOG_TAG      "hwrng_fake_srv"
 
-#warning "Compiling FAKE HWRNG provider"
+#pragma message "Compiling FAKE HWRNG provider"
 
 void hwrng_dev_get_rng_data(uint8_t *buf, size_t buf_len)
 {