_stricmp a Windows thing that is present in all the CRT, even in UCRT.
The stricmp() deprecated variant doesn't seem to exist elsewhere.
In some configuration it's not possible to link with stricmp() even though
_stricmp() is available.
With a proper C11 compiler we don't need this. Either they activate C11
things in the compiler which should be there anyway. Or in the SDK
which is __USE_MINGW_ANSI_STDIO for C99 and nothing else.
This patch tries to replicate configure.ac (at the time of writing)
from line 407 - 438, except the strict aliasing check. Libraries such as
ole32 are linked by default by meson, so those have been omitted.
Another difference: the check has been moved out of the mingw check.
This is not meant to be functional just yet, but having the winstore
option gives a starting point for further support.
