toolchain-shar-extract.sh: fix ~ not working in path
Fix a second regression in the extensible SDK installation caused by
OE-Core revision
6d2074d477596971dc52027dd87b02af7f39138d - the HOME
environment variable was being cleared, thus using ~/ in the install
path (which is in the default path for the extensible SDK) resulted in a
directory named '~' being created in the current directory.
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
