ci: Handle case where prebuilt was cached but brew install binutils

Author: btashton

cibuild.sh

@@ -348,6 +348,9 @@ function binutils {
     case $os in
       Darwin)
         brew install binutils
+	# It is possible we cached prebuilt but did brew install so recreate
+	# simlink if it exists
+        rm -f $prebuilt/bintools/bin/objcopy
         ln -s /usr/local/opt/binutils/bin/objcopy $prebuilt/bintools/bin/objcopy
         ;;
     esac