fix: android msg_iovlen type

[richard-ramos]

Summary

Exclude Android from the Linux x86_64 msg_iovlen branch in sendPacketsOut.

Android x86_64 should use the cint field type, while the existing Linux x86_64 path keeps using csize_t.

This also bumps the package version to 0.5.5.

Affected Areas

• Transports
  QUIC packet output now selects the Android-compatible Tmsghdr.msg_iovlen type on Android x86_64.

• Build / Tooling
  Updates lsquic.nimble from 0.5.4 to 0.5.5.

Impact on Library Users

No API changes.

Downstream projects that cross-compile for Android x86_64 can consume this release instead of carrying a local patch for the msg_iovlen type mismatch.

Risk Assessment

Low. The condition only changes behavior when android is defined; existing Linux x86_64 builds keep the previous csize_t path.

[Copilot]

Pull request overview

This PR adjusts platform-specific sendmsg struct initialization to avoid using an incompatible msg_iovlen type on Android, and bumps the package version accordingly.

Changes:

• Exclude Android from the Linux x86_64 msg_iovlen (csize_t) branch so Android uses the cint assignment path.
• Bump lsquic nimble package version from 0.5.4 to 0.6.0.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
lsquic/context/io.nim	Adjusts compile-time platform branching so Android uses the correct msg_iovlen cast for Tmsghdr.
lsquic.nimble	Updates the published package version.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.