disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

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# From https://www.gnu.org/software/classpath/announce/20120307.html
sha256    f929297f8ae9b613a1a167e231566861893260651d913ad9b6c11933895fecc8    classpath-0.99.tar.gz