LOCAL_SYSROOT is not found when running build-gunyah.sh

[ckocank]

(gunyah-venv) ckocank@hyp-dev-env:~/share/gunyah$ ls
hyp musl-c-runtime resource-manager

(gunyah-venv) ckocank@hyp-dev-env:~/share/gunyah$ sudo ~/utils/build-gunyah.sh qemu
LOCAL_SYSROOT is not found
/home/ckocank/utils/build-gunyah.sh: line 11: return: can only `return' from a function or sourced script

I already test that the built QEMU and Linux images work correctly, without Gunyah.

[quic-haripran]

@ckocank can you try running this script once inside docker environment core-utils/build-sysroot.sh?