tests: Add mbedtls_test_ prefix to rnd_* symbols

Add mbedtls_test_ prefix to rnd_buf_info and
rnd_pseudo_info types, to rnd_std_rand(),
rnd_zero_rand(), rnd_buffer_rand() and
rnd_pseudo_rand() functions.

Command to change *.function files:
find . -name "*.function" -exec awk -i inplace \
    '{sub(/rnd_(buf_info|pseudo_info|std_rand| \
    zero_rand|buffer_rand|pseudo_rand)/, \
    "mbedtls_test_&")}1' {} \;

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/tests/suites/test_suite_hmac_drbg.function b/tests/suites/test_suite_hmac_drbg.function
index b526f43..b848266 100644
--- a/tests/suites/test_suite_hmac_drbg.function
+++ b/tests/suites/test_suite_hmac_drbg.function
@@ -129,7 +129,7 @@
     md_info = mbedtls_md_info_from_type( md_alg );
     TEST_ASSERT( md_info != NULL );
 
-    TEST_ASSERT( mbedtls_hmac_drbg_seed( &ctx, md_info, rnd_std_rand, NULL,
+    TEST_ASSERT( mbedtls_hmac_drbg_seed( &ctx, md_info, mbedtls_test_rnd_std_rand, NULL,
                                  NULL, 0 ) == 0 );
 
     TEST_ASSERT( mbedtls_hmac_drbg_write_seed_file( &ctx, path ) == ret );