Do not #define bool when compiling in C++ (IDFGH-3078)

[strikosn]

Redefining bool, true and false breaks C++ builds which include BLE mesh headers. Guarding with #ifdef resolves the problem.

[CLAassistant]

All committers have signed the CLA.

[Alvin1Zhang]

@strikosn Thanks for your contribution.

[Campou]

Hi @strikosn

Thanks for the PR, could you please add a header ble_mesh: in the commit message?

Thanks.

[strikosn]

Added.

[strikosn]

I'm not authorized to merge this PR. Should I push into another branch?

[Campou]

Hi @strikosn

Currently I can only review the code, not authorized to merge it.

And based on our Wiki, I need to submit a MR internally, which contains the same information with this PR (i.e. author, commit message, sign-off, etc.). When the MR is merged internally, it will be synchronized to Github.

Thanks.

[Campou]

Hi @strikosn

I have submitted a MR for this PR internally, it will be merged soon.
And after some internal discussion, we decided to remove the boolean definitions in this header file entirely, since stdbool.h is already included for C.

Thanks.

[Alvin1Zhang]

Thanks for contribution, please refer to 371d590, will close the PR now. Thanks.