scripts: Add install-toolchain script
scripts: Add install-toolchain script

The script can be called in make target with in the docker image
creation to install the GCC/LLVM toolchain.

Change-Id: I58139c3b4d84fadee30e883846b7a924042b1578
GitOrigin-RevId: 8aa2ec0db776d908af5379c3230966c9773bb567

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