Fixed the issue where x86_64 architecture Windows systems could not emulate running Linux programs (dev branch).

[MuziStudio]

The main issue was that the alias for amd64 (x86_64) was missing in ql.host.arch, resulting in ql.host.arch being None. This caused an early return at ql_open_flag_mapping (const_mapping.py) without executing ret |= host_flags['O_BINARY'].value, leading to a binary truncation issue. This problem only occurs on the dev branch; the code structure in the master branch is different and does not have this issue.

Checklist

Which kind of PR do you create?

• This PR only contains minor fixes.
• This PR contains major feature update.
• This PR introduces a new function/api for Qiling Framework.

Coding convention?

• The new code conforms to Qiling Framework naming convention.
• The imports are arranged properly.
• Essential comments are added.
• The reference of the new code is pointed out.

Extra tests?

• No extra tests are needed for this PR.
• I have added enough tests for this PR.
• Tests will be added after some discussion and review.

Changelog?

• This PR doesn't need to update Changelog.
• Changelog will be updated after some proper review.
• Changelog has been updated in my PR.

Target branch?

• The target branch is dev branch.

One last thing

• I have read the contribution guide

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[elicn]

Good catch!
Thanks for contributing the fix.

(don't mind the failed tests indications, it is not related to your code)