Use long int instead uint64_t

This should prevent
```
../src/misc_tools.c: In function ‘get_elapsed_time_str’:
../src/misc_tools.c:81:9: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 4 has type ‘uint64_t’ [-Wformat]
../src/misc_tools.c:81:9: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 4 has type ‘uint64_t’ [-Wformat]
../src/misc_tools.c:83:9: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 4 has type ‘uint64_t’ [-Wformat]
../src/misc_tools.c:83:9: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 5 has type ‘uint64_t’ [-Wformat]
../src/misc_tools.c:83:9: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 4 has type ‘uint64_t’ [-Wformat]
../src/misc_tools.c:83:9: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 5 has type ‘uint64_t’ [-Wformat]
../src/misc_tools.c:85:9: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 4 has type ‘uint64_t’ [-Wformat]
../src/misc_tools.c:85:9: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 5 has type ‘uint64_t’ [-Wformat]
../src/misc_tools.c:85:9: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 6 has type ‘uint64_t’ [-Wformat]
../src/misc_tools.c:85:9: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 4 has type ‘uint64_t’ [-Wformat]
../src/misc_tools.c:85:9: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 5 has type ‘uint64_t’ [-Wformat]
../src/misc_tools.c:85:9: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 6 has type ‘uint64_t’ [-Wformat]
```