Rewrite HDF5 URL to follow new scheme

See: https://github.com/MacPython/h5py-wheels/pull/3

library_builders.sh

@@ -200,7 +200,8 @@ function build_hdf5 {
     # libaec is a drop-in replacement for szip
     build_libaec
     local hdf5_url=https://www.hdfgroup.org/ftp/HDF5/releases
-    fetch_unpack $hdf5_url/hdf5-$HDF5_VERSION/src/hdf5-$HDF5_VERSION.tar.gz
+    local short=$(echo $HDF5_VERSION | awk -F "." '{printf "%d.%d", $1, $2}')
+    fetch_unpack $hdf5_url/hdf5-$short/hdf5-$HDF5_VERSION/src/hdf5-$HDF5_VERSION.tar.gz
     (cd hdf5-$HDF5_VERSION \
         && ./configure --with-szlib=$BUILD_PREFIX --prefix=$BUILD_PREFIX \
         && make \