android: Add getauxval for 32-bit targets

[taiki-e]

Description

getauxval has been added in Android 4.3 (API level 18). (Since Rust 1.68, std requires API level 19+)

(On Android, getauxval is currently only provided for 64-bit targets #1991)

Sources

Checklist

• Relevant tests in libc-test/semver have been updated
• No placeholder or unstable values like *LAST or *MAX are
  included (see #3131)
• Tested locally (cd libc-test && cargo test --target mytarget);
  especially relevant for platforms that may not be checked in CI

[rustbot]

r? @tgross35

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[rustbot]

Some changes occurred in the Android module

cc @maurer

[maurer]

LGTM for Android

[tgross35]

@rustbot label +stable-nominated