RFR: 8178499: Remove _ptr_ and _size_ infixes from align functions

[Stefan Karlsson]

Hi all,

Please review this patch to remove the _ptr_ and _size_ infixes from 
align functions.

http://cr.openjdk.java.net/~stefank/8178499/webrev.00
http://bugs.openjdk.java.net/browse/JDK-8178499

Rename functions (and corresponding macros) from:
  align_ptr_up
  align_size_up
  align_ptr_down
  align_size_down
  is_ptr_aligned
  is_size_aligned

to:
  align_up
  align_down
  is_aligned

The patch builds upon the changes in:
  http://mail.openjdk.java.net/pipermail/hotspot-dev/2017-June/027328.html

Thanks,
StefanK