[PATCH 1/3] configure: Don't use -fPIC on mingw targets.

[Jacek Caban]

Fixes PE-only builds with llvm-mingw. The option is not relevant on 
mingw. While mingw GCC ignores it, Clags issues an error.

Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---
  configure.ac | 7 +++++--
  1 file changed, 5 insertions(+), 2 deletions(-)