[gdal/f17] (5 commits) ...rebuild (libwebp)

[Rex Dieter]

Summary of changes:

  a7ede78... Correct ppc/ppc64 conditionals (*)
  dc800b6... Rebuild for libspatialite soname bump (*)
  d44a5ea... Rebuild for hdf5 1.8.10 (*)
  bba28d9... Tweak -fpic CFLAGS to fix FTBFS on ARM (*)
  449f8bc... rebuild (libwebp)

(*) This commit already existed in another branch; no separate mail sent