Drop unnecessary stdint and inttypes header checks

[Girgias]

As they are always available per C99.

Hopefully I didn't forget any checks and the script generating the libmagic.patch did it's job.

[nikic]

Before we do this, I'd like to get rid out our stdint.h / inttypes.h shims for Windows, so we really are using only system headers. @cmb69 Am I understanding right that we no longer need win32/php_stdint.h? It seems that our MSC_VER requirement on master is 1920, while this header is for < 1900.

[cmb69]

While it still should be possible to build master with VS 2017 and maybe VS 2015, there is certainly no need to support older VS versions, so win32/php_inttypes.h can be removed. Thanks.

[cmb69]

I think https://gist.github.com/cmb69/e517a72a5d86b9982e1a9ad3d10517f7 can be applied on top of this PR (note that I have ignored libmagic.patch). I'm not quite sure about the u_char typedefs; likely these can be removed as well, what would give more opportunities to refactor a bit more.

[cmb69]

https://gist.github.com/cmb69/553a44f5b3f6027fe9c5931cf2b845fe drops several superfluous u_char fallback definitions, but keeps one in php_stdint.h. Maybe we should actually remove the u_char definition in favor of standard types, like we did with uint and ulong in 7.4.

[Girgias]

@cmb69 can we also drop the "ifdef HAVE_INT8_T and co variants or are those still needed?

[cmb69]

can we also drop the "ifdef HAVE_INT8_T and co variants or are those still needed?

These are not needed for Windows (since the macro is no longer defined), but maybe for other systems?

[Girgias]

can we also drop the "ifdef HAVE_INT8_T and co variants or are those still needed?

These are not needed for Windows (since the macro is no longer defined), but maybe for other systems?

I'm trying to read up on it, but it seems Autoconf takes care of defining (at least some of them) when they are not available: https://www.gnu.org/software/autoconf/manual/autoconf-2.60/html_node/Particular-Types.html