bootchart: fix typos in copyright notices

"Corporation" was misspelled as "Coproration"
build-sys: don't install quotaon.service twice

quotaon.service is already installed through dist_systemunit_DATA, so it doesn't
need to be added to nodist_systemunit_DATA.  Installing the same file twice
results in a race condition where the install process can fail.

https://bugs.freedesktop.org/show_bug.cgi?id=65659

[zj: actually remove quotaon.service from the other list.]