pcp updates: multi-archive: Fix loss of origin across archive boundary

[Dave Brolley <brolley@xxxxxxxxxx>]

ctxp->c_origin was being reset when crossing from one archive to the 
next which caused several problems including a change of sampling rate 
for the new archive.
----------------------------------------------------------

Changes committed to git://git.pcp.io/brolley/pcp.git multi-archive

Dave Brolley (1):
      Multi-archive: Don't reset c_origin and c_mode when switching to 
the next archive.
 src/libpcp/src/logutil.c    |   14 ++++++++++++++