[jdk11u-dev] RFR: 8283018: 11u GHA: Update GCC 9 minor versions

[Aleksey Shipilev]

Current GHA runs in 11u fail with:


E: Version '9.3.0-17ubuntu1~20.04cross2' for 'gcc-9-aarch64-linux-gnu' was not found
E: Version '9.3.0-17ubuntu1~20.04cross2' for 'g++-9-aarch64-linux-gnu' was not found


We should update these. 11u GHA workflow runs GCC 9, not GCC 10 like the rest of releases, so this is the 11u-specific bug.

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Commit messages:
 - Upgrade to GCC 9.4.0

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/879/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=879&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8283018
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/879.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/879/head:pull/879

PR: https://git.openjdk.java.net/jdk11u-dev/pull/879