Don't symlink macOS framework if not building it

If only iOS frameworks are being build, we should not try to create
macOS framework by symlinking stuff. Do this only if the framework
actually requested by the arch/target selection.

Author: ilammy

create-openssl-framework.sh

@@ -149,6 +149,9 @@ for SYS in ${ALL_SYSTEMS[@]}; do
     if [[ $SYS == "MacOSX" ]]; then
         SYSDIR="$FWROOT/$SYS"
         FWDIR="$SYSDIR/$FWNAME.framework"
+        if [[ ! -e "$FWDIR" ]]; then
+            continue
+        fi
         cd $FWDIR
 
         mkdir "Versions"