"man source" says:
"If filename does not contain a slash, file names in PATH are used to
find the directory containing file‐ name. The file searched for in PATH
need not be executable. When bash is not in posix mode, the
current directory is searched if no file is found in PATH."
Change-Id: I7dc15d30ba925c71d02da2cd8b91ea08192730fc
it allows to source variables from config_host.mk into shell;
there are many different hacks for this on other locations
Use this script in bin/distro-install-*; The original solution
with 'eval' did not work because shell was not able to pass
that many arguments
Change-Id: I3d9eb2fe2d6804a3c7783487e9c70f093edb2ad5