[PATCH 3/3 v2] msvcrt: Import powf implementation from musl.

[Piotr Caban]

Signed-off-by: Piotr Caban <piotr(a)codeweavers.com>
---
  dlls/msvcrt/math.c    | 177 ++++++++++++++++++++++++++++++++++++++++--
  dlls/msvcrt/unixlib.c |   9 ---
  dlls/msvcrt/unixlib.h |   1 -
  3 files changed, 171 insertions(+), 16 deletions(-)