Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC 264696, 264721,

Add the deprecated fp{get,set}* functions, a few ports use them.

Rename the fp{get,set}* files so they no longer conflict with the
softfloat version of these files.

Rename the fp{get,set}* files so they no longer conflict with the softfloat
version of these files. Keep them within this directory so they can be used
to implement the armv6 version of these functions.

Add the deprecated fp{get,set}* functions, a few ports use them.