RFR: 8377905: gcc.md included with every build

[Phil Race]

On Fri, 20 Feb 2026 22:38:20 GMT, Mikael Vidstedt <mikael at openjdk.org> wrote:

> JDK-8377509 added the gcc.md license file. Unfortunately the file is unconditionally in the built JDK regardless of the toolchain used. This change updates the build logic to only include the file when relevant.
> 
> Testing: tier1, builds-tier[2-5], manual verification to ensure the file is only included where expected.

LGTM.
This change seems very simple .. seems like it would be OK for 26 GA.

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Marked as reviewed by prr (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/29853#pullrequestreview-3834745124