fix docker build bug (#22430)

tools/manylinux1/build_scripts/build_utils.sh

@@ -111,9 +111,9 @@ function build_cpython {
 
 
 function build_cpythons {
+    for py_ver in $@; do
         check_var $GET_PIP_URL
         curl -sLO $GET_PIP_URL
-    for py_ver in $@; do
         build_cpython $py_ver
     done
     rm get-pip.py