RFR: 8265982: JDK-8264188 breaks build on macOS-aarch64

[Magnus Ihse Bursie]

Unfortunately JDK-8264188 broke the build on macosx-aarch64. 

The likely culprit for this is that the newly introduced assembly file was named "*.s" instead of "*.S". However, I have still not verified that this (completely) fixes the issue, since my job got stuck in our CI system. Since this is a P1, I wanted to speed on the process by submitting this PR for review even though the results are not yet in. (I will not push until they are.)

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Commit messages:
 - 8265982: JDK-8264188 breaks build on macOS-aarch64

Changes: https://git.openjdk.java.net/jdk/pull/3697/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3697&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265982
  Stats: 0 lines in 1 file changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3697.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3697/head:pull/3697

PR: https://git.openjdk.java.net/jdk/pull/3697