tests: Update generator with Mbed Crypto comments

Update comments in the top of the test code generator script with the
name of the parent project.

Author: Patater

tests/scripts/generate_test_code.py

@@ -24,15 +24,12 @@
 framework. This doc string contains a summary of the framework
 and explains the function of this script.
 
-Mbed TLS test suites:
+Mbed Crypto test suites:
 =====================
 Scope:
 ------
-The test suites focus on unit testing the crypto primitives and also
-include x509 parser tests. Tests can be added to test any Mbed TLS
-module. However, the framework is not capable of testing SSL
-protocol, since that requires full stack execution and that is best
-tested as part of the system test.
+The test suites focus on unit testing the crypto primitives. Tests can be added
+to test any Mbed Crypto module.
 
 Test case definition:
 ---------------------