fix: always occur signal 31 when executing C-based program

[mansukim1125]

Description

I realized that every time I run a C-based program, I always get signal 31. When I searched, I found that other people were experiencing the same issue, and syscall 17 (pread64) was mentioned as the cause. Therefore, we would like to address this issue by adding pread64 to syscalls_whitelist in src/rules/c_cpp.c.

References:

• Python writing file returns Runtime Error in File IO mode #39
• 关于uid和gid的问题 #46
• Gives runtime error all time on Ubuntu 20.04 #47
• 判题时报错 #54
• 运行demo时，result=4，请问大佬有解决办法么？ #58

Fixes #39 #46 #47 #54 #58

Type of change

• Bug fix (non-breaking change which fixes an issue)