SECURITY.md: add SECURITY.md file to define security policy

Added a SECURITY.md file to outline how users can responsibly report
security vulnerabilities and to define the project's security policy.

Signed-off-by: drosdi <[email protected]>

Author: drosdi

SECURITY.md

@@ -0,0 +1,5 @@
+# Security Policy
+Altera is committed to the security of its products.
+
+## Reporting a Vulnerability
+Security vulnerabilities in this project can be reported to Altera’s security incident response team utilizing the guidelines here: https://www.altera.com/security/psirt.html.