use default MODEL unless explicitly set
Fixed 2.062 OS X regression introduced by 830e0770.

This reverts the module to the pre-830e0770 state for
non-Linux. It should probably be amended to follow the
same conventions as for other module files, which might
help to avoid such problems.
Merge pull request #479 from klickverbot/osx-statvfs

Fixed 2.062 OS X regression introduced by 830e0770.
Merge pull request #475 from dawgfoto/defaultMODEL

use default MODEL unless explicitly set
MinGW: core.stdc.math macro implementations.
MinGW: Use __mingw_* versions of C formatting functions.

The unprefixed versions are pulled in from the Microsoft C
runtime by default, and thus do not support long doubles
and, in the case of ldexp, the hexadecimal floating point
literal syntax.
Merge pull request #481 from klickverbot/mingw

Floating point math/formatting for MinGW
Merge branch 'master' of https://github.com/D-Programming-Language/druntime