Getting the MinSizeRel build working for the ESP32

[MatthiasJentsch]

Description

MinSizeRel build is now working for the ESP32. We can change the appveyor.yml to use the MinSizeRel build

Motivation and Context

• Closes Build breaks for ESP32 if config flavour is MinSizeRel  Home#353

How Has This Been Tested?

After compiling the MinSizeRel build for ESP32 I could deploy and run a test program on the ESP32

Types of changes

• Improvement (non-breaking change that improves a feature, code or algorithm)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

Signed-off-by: Matthias Jentsch info@matthias-jentsch.de

[nfbot]

Hi @MatthiasJentsch,

I'm nanoFramework bot.
Thank you for your contribution!

A human will be reviewing it shortly. 😉