drop _mingw32_c++ macro (RedHat bug #974773)

added %_mingw32_pkg_name

synchronized with mingw32-filesystem-69-7
fixed bug with undefined %__cmake

fix optflags

build for Sisyphus from Fedora

Updated ChangeLog comment from previous version as the RPM variable
debuginfo subpackage generation

Add script to create -debuginfo subpackages
All mingw32 packages now need to add these lines to their .spec files:

Add CMake rules

Fix dependency problem with + in DLL name (Thomas Sailer).

Fix up and test mingw32-pkg-config changes.

Add mingw32-pkg-config.

Rebuilt for https://fedoraproject.org/wiki/Fedora_11_Mass_Rebuild

Rebuild for mingw32-gcc 4.4

Added virtual provides for mingw32(cfgmgr32.dll) and mingw32(setupapi.dll).

Fix _mingw32_configure.

Rename mingw32-COPYING to COPYING.
Rename mingw32-macros.mingw32 to macros.mingw32.
_mingw32_configure looks for configure in "." and ".." dirs.
Added _mingw32_description.
Added mingw32(version.dll) virtual provides (rhbz#485842).