Add within-kilo and update within-master

Projects master branches have opened for kilo and juno proposed+stable branches
have been cut. This update sideways master symlink to point to the correct
directory, ensuring that sideways runs against master branches run the correct
'within-kilo' scripts.

Change-Id: I27eaee22d46643f847cdd40a86a14cb7d9aa794b
Merge "Add within-kilo and update within-master"