Specify gcc/g++ 11
Specify gcc/g++ 11

It is used to build OT host binaries as well as verilator

Change-Id: I0576ce8544c6f194df71d9655ad1f30a21a68d18
GitOrigin-RevId: b051136087f4112546c2750b92eb2ae84567c009

AmbiML/sparrow-scripts-full,AmbiML/sparrow-scripts-full