fix missing line in build.sh
#!/bin/bash
if [[ $target_platform =~ linux.* ]] || [[ $target_platform == win-32 ]] || [[ $target_platform == win-64 ]] || [[ $target_platform == osx-64 ]]; then
export DISABLE_AUTOBREW=1
+ mv DESCRIPTION DESCRIPTION.old
grep -va '^Priority: ' DESCRIPTION.old > DESCRIPTION
$R CMD INSTALL --build .
else
