Fix jpeg installation on OSX

bootstrap-conda.sh

@@ -44,6 +44,9 @@ if [ ! -d ${PREFIX} ]; then
   curl --silent https://gitlab.idiap.ch/bob/bob.admin/raw/master/${ARCH}/devel-py${pyver}.txt > env.txt
   echo "[++] Bootstrapping conda installation at ${PREFIX}..."
   run_cmd ${CONDA_FOLDER}/bin/conda create --prefix ${PREFIX} --file env.txt --yes
+  if [ "${ARCH}" == "macosx" && -e "${PREFIX}/lib/libjpeg.8.dylib" ]; then
+    run_cmd install_name_tool -id @rpath/libjpeg.8.dylib ${PREFIX}/lib/libjpeg.8.dylib
+  fi
   run_cmd ${CONDA_FOLDER}/bin/conda clean --lock
 else
   echo "[!!] Prefix directory ${PREFIX} exists, not re-installing..."