fix syntax

build_lofar.sh

@@ -413,7 +413,7 @@ if [ ! -e $prefix/.done ]; then
         git clone https://gitlab.com/aroffringa/aoflagger.git src
         if [ "$aoflagger_version" != "latest" ]; then
             ( cd src && git checkout tags/v$aoflagger_version )
-        fi &&
+        fi
     fi &&
     mkdir build &&
     cd    build &&