common.cpp printf() formats for [u]int64_t and size_t warnings

[leok7v]

While compiling on windows with cl.exe for x64 following warnings observed.

ggml\examples\common.cpp(353,21): warning C4477: 'fprintf' : format string '%lu' requires an argument of type 'unsigned long', but variadic argument 2 has type 'size_t'
ggml\examples\common.cpp(353,21): message : consider using '%zu' in the format string
ggml\examples\common.cpp(353,21): warning C4477: 'fprintf' : format string '%lu' requires an argument of type 'unsigned long', but variadic argument 3 has type 'unsigned __int64'
ggml\examples\common.cpp(353,21): message : consider using '%zu' in the format string
ggml\examples\common.cpp(353,21): warning C4477: 'fprintf' : format string '%lu' requires an argument of type 'unsigned long', but variadic argument 2 has type 'size_t'
ggml\examples\common.cpp(353,21): message : consider using '%zu' in the format string
ggml\examples\common.cpp(353,21): warning C4477: 'fprintf' : format string '%lu' requires an argument of type 'unsigned long', but variadic argument 3 has type 'unsigned __int64'
ggml\examples\common.cpp(353,21): message : consider using '%zu' in the format string
ggml\examples\common.cpp(353,21): warning C4477: 'fprintf' : format string '%lu' requires an argument of type 'unsigned long', but variadic argument 2 has type 'size_t'
ggml\examples\common.cpp(353,21): message : consider using '%zu' in the format string
ggml\examples\common.cpp(353,21): warning C4477: 'fprintf' : format string '%lu' requires an argument of type 'unsigned long', but variadic argument 3 has type 'unsigned __int64'
ggml\examples\common.cpp(353,21): message : consider using '%zu' in the format string
ggml\examples\common.cpp(353,21): warning C4477: 'fprintf' : format string '%lu' requires an argument of type 'unsigned long', but variadic argument 2 has type 'size_t'
ggml\examples\common.cpp(353,21): message : consider using '%zu' in the format string
ggml\examples\common.cpp(353,21): warning C4477: 'fprintf' : format string '%lu' requires an argument of type 'unsigned long', but variadic argument 3 has type 'unsigned __int64'
ggml\examples\common.cpp(353,21): message : consider using '%zu' in the format string

Nothing major or urgent but for clarity and easy of keeping in sync:

Maybe use:
#include <inttypes.h>
int64_t t;
printf("%" PRId64 "\n", t);

like: https://en.cppreference.com/w/cpp/types/integer

#include
#include

int main()
{
std::printf("%zu\n", sizeof(std::int64_t));
std::printf("%s\n", PRId64);
std::printf("%+" PRId64 "\n", INT64_MIN);
std::printf("%+" PRId64 "\n", INT64_MAX);

std::int64_t n = 7;
std::printf("%+" PRId64 "\n", n);

}

If you want pull request I can do the change but it's trivial to fix, maybe less trouble then reading the diff and accepting PR.