Sometimes the peg revision functionality we use in the svn fetcher is
not the correct option. Add a parameter nopegrevision which can be added
to disable this behaviour.
[YOCTO #6258]
(Bitbake rev: ea26682b706f655a8e418f56bebe742e2d130a1d)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>