Fix vulnerabilities found while checking r2 cves.

[wargio]

do not squash

Your checklist for this pull request

• I've read the guidelines for contributing to this repository
• I made sure to follow the project's coding style
• I've documented or updated the documentation of every function and struct this PR changes. If not so I've explained why.
• I've added tests that prove my fix is effective or that my feature works (if possible)
• I've updated the rizin book with the relevant information (if needed)

Detailed description

• Harden string limits in coresymbolication.c to make ASAN happy
• Fix out of bound read in analysis_objc.c
• Always check for null when calling calloc in dyldcache.c

[XVilka]

Blocked until fuzzing slowness is addressed