Include update alternatives for clang

Also, clean up some of the possible errors in the tidy process to make
sure that things like CD are cleaned up properly.

Tested:
I wish I knew why my docker environment seems to be different than when
jenkins runs it, but alas, this continues to pass on my machine when I
run it against a bmcweb tree with a clang-tidy file in it.

Signed-off-by: Ed Tanous <ed@tanous.net>
Change-Id: Ic88fd9ef3227b21c0d60d2c2d68d21ef15e3bd40
2 files changed