a8d4f90 Restore and rebase FHS compliance patch

Authored and Committed by Jeremy Newton a year ago
    Restore and rebase FHS compliance patch
    
    I removed this patch erroneously in a rush earlier. This patch is still
    needed and needs rebasing.
    
    I also cleaned up the old dropped LLVM 15 patch.
    
        
file modified
+3 -0