Request to add git url in building systemtap guide

[Frank Ch. Eigler]

gowrishankar <gomuthuk@linux.vnet.ibm.com> writes:

> [...]  Can you please add git url for systemtap source, in "Building
> Systemtap Mainline" section of link
> "http://sources.redhat.com/systemtap/wiki/SystemtapOnUbuntu".  [...]

The wiki is a community resource.  You can create yourself a login account
and edit the page to your liking.

- FChE