[JDK-8372554](https://bugs.openjdk.org/browse/JDK-8372554) disabled LTO for libsplashscreen to fix an issue with the comparison build. It turns out the failure was caused by extra files that LTO produced and which were included in the image. Now that [JDK-8373255](https://bugs.openjdk.org/browse/JDK-8373255) has fixed that we should be able to reenable LTO again.
------------- Commit messages: - JDK-8373388 Changes: https://git.openjdk.org/jdk/pull/28746/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28746&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8373388 Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/28746.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/28746/head:pull/28746 PR: https://git.openjdk.org/jdk/pull/28746
