RFR(M): 8042737 : Introduce umbrella header prefetch.inline.hpp

[Lindenmaier, Goetz]

Hi,

This change introduces an umbrella header for prefetch_<os>_<cpu>.inline.hpp
files: runtime/prefetch.inline.hpp as proposed in
http://mail.openjdk.java.net/pipermail/hotspot-dev/2014-April/013702.html
This follows the scheme applied to atomic.inline.hpp.

Further this change adds includes of prefetch.inline.hpp in all .cpp
and .inline.hpp files where a method of Prefetch declared 'inline' is
called.

Finally it moves macros calling inline methods of Prefetch from
space.hpp to the corresponding .inline.hpp file and adds the necessary
includes in files using the moved macros.

Please review and test this change.  I please need a sponsor.
http://cr.openjdk.java.net/~goetz/webrevs/8042737-prefIncl/webrev.00/

Thanks and best regards,
  Goetz.