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_ctr_drbg.function b/tests/suites/test_suite_ctr_drbg.function
index 8317c08..d8301bf 100644
--- a/tests/suites/test_suite_ctr_drbg.function
+++ b/tests/suites/test_suite_ctr_drbg.function
@@ -316,7 +316,7 @@
 
     mbedtls_ctr_drbg_init( &ctx );
 
-    TEST_ASSERT( mbedtls_ctr_drbg_seed( &ctx, rnd_std_rand, NULL, NULL, 0 ) == 0 );
+    TEST_ASSERT( mbedtls_ctr_drbg_seed( &ctx, mbedtls_test_rnd_std_rand, NULL, NULL, 0 ) == 0 );
     TEST_ASSERT( mbedtls_ctr_drbg_write_seed_file( &ctx, path ) == ret );
     TEST_ASSERT( mbedtls_ctr_drbg_update_seed_file( &ctx, path ) == ret );