Fix for supporting C++14 sized deallocation operator

[antisvin]

It's a minor issue, but I felt like doing something with low practical value today.

This fixes error that was happening when building under C++14. I didn't change Makefiles themselves to use it, just confirmed that defining operator makes it work. It looks like building in C++14 mode made no changes to firmware code size, so GCC is likely generating the same code unless some newer language features are used.

Info about this in C++ standard is here: https://isocpp.org/files/papers/n3778.html

Size parameter is just a hint that allows writing more effective deallocation handlers, but it's often ignored. Since Freertos deallocator doesn't support such parameter, we can also ignore it (this seems to also be the case if using GCC stdlib)

I've added sized delete[] operator as well for completeness, but it doesn't seem to be required in our code yet.

[pingdynasty]

Okay! Merged into develop. Are there any specific C++14 features you think we should use?

[antisvin]

First of all, there's not so much new features in C++14 - I can only think of variable templates and binary literals as useful new features.

But it also does fix lots of flaws/restrictions in C++11 and this standard has plenty of good stuff. Many of those features could be used more often here - I would say at least constexpr, uniform initialization and operator deleting are particularly important.