Add .fpu directives to ARM unwind save & restore functions.

TODO: The iwmmx register save & restore functions still need the same treatment.
      I didn't do that in this patch because the integrated assembler has a bug
      where it refuses to build them on -march=armv6-m, even with
         .march armv5t
      in front of those functions.

This should fix PR22384.

git-svn-id: 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed