Log Message:
benchmarks/phoronix-test-suite: Change "cp -r"

The "-r" option is highly discouraged in BSD although it's reluctantly
supported.  The problem is that it doesn't behave the same on all
platforms.  For example, "cp -r pts-core/ destdir/" won't always give
the same results:

On NetBSD,   pts-core files are put: /destdir/pts-core/<files>
On DragonFly pts-core files are put: /destdir/<files>

That messes the PLIST up.
This changes "cp -r <dir>/" to "cp -R <dir>" \ 
which has the same
behavior on different platforms.  Tested on NetBSD and DragonFly