Drop -fno-strict-aliasing flag from capstone next build

[kazarmy]

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

After capstone-engine/capstone@cb2b879, the original reason for -fno-strict-aliasing for the capstone next build no longer applies and therefore the flag should be dropped.

Test plan

All builds (except the rz-bindgen build) are green.

Closing issues

Closes #4048.