[bugfix] urt_time is signed

And so it should be printed with %lld not %llu

Signed-off-by: Shahbaz Youssefi <ShabbyX@gmail.com>
[install] missing header files

Signed-off-by: Shahbaz Youssefi <ShabbyX@gmail.com>
[bugfix] remove dependency on internal headers

Signed-off-by: Shahbaz Youssefi <ShabbyX@gmail.com>
[linux] [update] urt_time is now long long

int64_t is long on 64 bit machines while its long long on 32 bit ones.
This caused confusion for printf.

Signed-off-by: Shahbaz Youssefi <ShabbyX@gmail.com>