Fix inttypes inclusion

[0xc0170]

__STDC_FORMAT_MACROS needs to be added for format specifiers like PRId32
IAR/ARMCC do not define it

[0xc0170]

Important fix for 5.11rc1, please review

Note, compile example with ARMCC/IAR as there are differences sometimes

[kjbracey]

As a general rule, I'd be inclined to stick that define at the very top of the file. There's a potential problem if "psa/crypto.h" were to include <inttypes.h> itself - your second include wouldn't do anything. If that macro is required, it has to be set before the first include.

(This is unlike NDEBUG, which are you are allowed to change and reinclude <assert.h> to flip assert behaviour back and forth).

That macro is dumb, and has been disowned by all standards bodies involved - toolchains should have been revised to not care about it.

[0xc0170]

I would expect "psa/crypto.h" to do the same if there would do any magic related to this macro. OK, will do add it just in case. rebase incoming

[0xc0170]

Fixed

[kjbracey]

Unfortunately it might be using only the bits of the header that don't need the macro, so not have had the need to set it.

Certainly I do tend to add the macro myself in any header even if I don't need it just to avoid that trap - eg ns_types.h, but can't rely on what random headers do.

[0xc0170]

@Patater As this fixes the problem. I'll merge this and restart testing for the example inclusion (this should be safe to merge now).