buildGraalvm: move files in $out to $out/share (#346174)

      # jni.h expects jni_md.h to be in the header search path.

      ln -sf $out/include/linux/*_md.h $out/include/

      mkdir -p $out/share

      # move files in $out like LICENSE.txt

      find $out/ -maxdepth 1 -type f -exec mv {} $out/share \;

      # symbolic link to $out/lib/svm/LICENSE_NATIVEIMAGE.txt

      rm -f $out/LICENSE_NATIVEIMAGE.txt

      # copy-paste openjdk's preFixup

      # Set JAVA_HOME automatically.

      mkdir -p $out/nix-support