Insecure API when using in React Native iOS app

[master4-2021]

There are some insecure APIs that exists in this repository that Apple considered insecure and recommended not using:
https://developer.apple.com/library/archive/documentation/Security/Conceptual/SecureCodingGuide/Articles/BufferOverflows.html#//apple_ref/doc/uid/TP40002577-SW1

These are reported when using Mobile Security Framework (https://github.com/MobSF/Mobile-Security-Framework-MobSF) to scan the IPA.

strncpy:

glog/src/symbolize.cc

Line 658 in 6ed0c9e

strncpy(out_file_name, cursor, out_file_name_size);

glog/src/symbolize.cc

Line 729 in 6ed0c9e

strncpy(dest, source, dest_size);

glog/src/demangle.cc

Line 1344 in a34226c

strncpy(buffer, lparen + 1, length);

I understand that the use of these function does not definitely leads to security issues, but I want to bring this to your attention, and check if these are safe to use within our application.

[sergiud]

Issue wording almost entirely copy pasted from #889.