Update changelog for marvell sdk and pkcs11 submodule
#### PKCS #11
- Update the PKCS #11 third-party headers to be the latest from OASIS (version 2.40 Plus Errata 01).
+- Add PKCS #11 as a submodule.
#### Bluetooth Low Energy
- ESP32 board supports NIMBLE as the default underlying stack for Bluetooth Low Energy.
- Contains bug fixes and enhancements in ESP NIMBLE stack.
- Contains bug fixes in ESP Bluedroid stack.
+#### Marvell SDK Update
+- Marvell SDK now updated to R8 P2 (v1.2.r8.p2)
+
## 201908.00 08/26/2019
### New Features
