Update to 6.16.00
    Drop patches accepted upstream:
      root-adjust-allowed-test-difference-for-32-bit-ix86.patch
      root-crypto.patch
      root-js-syntax.patch
      root-missing-header.patch
      root-set-cache-file-dir.patch
      root-stressgraphics-ref.patch
      root-test-compilation-epel7.patch
      root-test-subdirs.patch
      root-unique-filenames.patch
    Dropped subpackages:
      root-rootd (obsolete - use xrootd)
      root-proofd (obsolete - use root-xproofd)
      root-proof-pq2
    New ROOT 7 subpackage:
      root-graf3d-eve7
      root-gui-webgui6
    Make tutorial/v7/line.cxx run in batch mode