Adding LTO to intro

Author: iriark01

docs/introduction/introduction.md

@@ -24,6 +24,7 @@ Our [quick start](../quick-start/index.html) guides show how to build an example
 
 ## Recently updated documentation
 
+- A new [tutorial about link time optimization](../apis/link-time-optimization.html).
 - A new [PSA porting guide](../porting/porting-security.html).
 - New information about [API life cycle ](../introduction/versions-and-releases.html#the-api-life-cycle) and how to [contribute experimental APIs](../contributing/software-design.html#experimental-apis) and [use them in an application](../program-setup/build-rules.html#label-directories).
 - [Tickless mode porting updates](../porting/tickless-mode.html).

docs/introduction/tutorials_intro.md

@@ -13,7 +13,7 @@ This page is an index of all tutorials and official examples.
 | Network socket | | - [Sockets](https://github.com/ARMmbed/mbed-os-example-sockets) <br/> - [Socket statistics](https://github.com/ARMmbed/mbed-os-example-socket-stats) |
 | NFC | | - [Smart Poster](https://github.com/ARMmbed/mbed-os-example-nfc/blob/master/NFC_SmartPoster/README.md) <br/> - [EEPROM](https://github.com/ARMmbed/mbed-os-example-nfc/blob/master/NFC_EEPROM/README.md)|
 | Network secure socket | | [TLS socket](https://github.com/ARMmbed/mbed-os-example-tls-socket) |
-| Platform | - [Application flow control](../apis/platform-tutorials.html) <br/> - [Power optimization](../apis/power-optimization.html) | - [Thread statistics](https://github.com/ARMmbed/mbed-os-example-thread-statistics) <br/> - [CPU statistics](https://github.com/ARMmbed/mbed-os-example-cpu-stats) <br/> - [Error handling](https://github.com/ARMmbed/mbed-os-example-error-handling) <br/> - [System information](https://github.com/ARMmbed/mbed-os-example-sys-info) |
+| Platform | - [Application flow control](../apis/platform-tutorials.html) <br/> - [Power optimization](../apis/power-optimization.html) | - [Thread statistics](https://github.com/ARMmbed/mbed-os-example-thread-statistics) <br/> - [CPU statistics](https://github.com/ARMmbed/mbed-os-example-cpu-stats) <br/> - [Error handling](https://github.com/ARMmbed/mbed-os-example-error-handling) <br/> - [System information](https://github.com/ARMmbed/mbed-os-example-sys-info) <br/> - [Link time optimization](../apis/link-time-optimization.html) |
 | Scheduling | [EventQueue](../apis/scheduling-tutorials.html) | |
 | Security | [Secure communication](../apis/tls-tutorial.html) | - [ATECC608A secure element](https://github.com/ARMmbed/mbed-os-example-atecc608a) <br/> - [DeviceKey](https://github.com/ARMmbed/mbed-os-example-devicekey) <br/> - [Mbed Crypto](https://github.com/ARMmbed/mbed-os-example-mbed-crypto) <br/> - [Mbed TLS: Authenticated encryption](https://github.com/ARMmbed/mbed-os-example-tls/blob/master/authcrypt) <br/> - [Mbed TLS: Benchmark](https://github.com/ARMmbed/mbed-os-example-tls/blob/master/benchmark) <br/> - [Mbed TLS: Hashing](https://github.com/ARMmbed/mbed-os-example-tls/blob/master/hashing) <br/> - [Mbed TLS: TLS client](https://github.com/ARMmbed/mbed-os-example-tls/blob/master/tls-client) <br/> - [PSA](https://github.com/ARMmbed/mbed-os-example-psa/) <br> - [PSA attestation](https://github.com/ARMmbed/mbed-os-example-attestation) |
 | USB | [Audio player](../apis/usb-wav-audio-player.html) | |