message: Don't overwrite LD_LIBRARY_PATH in config.sh
diff: set -e
  -export LD_LIBRARY_PATH="$(rustc --print sysroot)/lib"
  -export DYLD_LIBRARY_PATH=$LD_LIBRARY_PATH
  +export LD_LIBRARY_PATH="$(rustc --print sysroot)/lib:$LD_LIBRARY_PATH"
  +export DYLD_LIBRARY_PATH="$(rustc --print sysroot)/lib:$DYLD_LIBRARY_PATH"
  