Update --enable-jni to define SESSION_CERTS for wolfJSSE

[cconlon]

Description

This PR updates --enable-jni to define SESSION_CERTS.

This is needed for wolfJSSE SSLSession.getPeerCertificate() to return cert chain post handshake.

Testing

Exposed through SunJSSE tests, specifically SSLEngine.ConnectionTest. This has also been recommended to support users frequently, so should reduce a few minor JSSE support cases.

Checklist

• [ ] added tests
• [ ] updated/added doxygen
• [ ] updated appropriate READMEs
• [ ] Updated manual and documentation