mbeddr config item C90 does not omit inclusions of stdbool

[joao-silveira]

C90 does not contain stdbool header

[bkolb]

That should be added to the c90Code script: http://localhost:8080/select/tutorial/r:5f62df63-885f-42f0-80d6-e13ad6c51489/6290199614771888648/

In addition, we should cleanup the way we add , and . Currently they are added always to every header we generated. see http://localhost:8080/select/tutorial/r:5f62df63-885f-42f0-80d6-e13ad6c51489/8322694141616007845/