feat: add ubuntu 12.04 docker build env

bin/build.sh

@@ -142,13 +142,25 @@ esac
 
 make_ocs_bin()
 {
-    cd $src_ocs_dir
-    echo -n "make clean ... "
-    make clean 1>/dev/null 2>&1
-    echo "done"
     if [ -z $bin_tag ]; then
         bin_tag="pncc"
     fi
+    cd $src_ocs_dir    
+    if [ $bin_tag = "cook" ]; then
+        if [ $rel_os = "ub22" ]; then
+            echo "Ubuntu 22.04 is not supported"
+            exit 1
+        fi
+        git checkout cook
+        git pull
+    else
+        git checkout main
+        git pull
+    fi
+
+    echo -n "make clean ... "
+    make clean 1>/dev/null 2>&1
+    echo "done"
     echo -n "make $bin_tag $pkg_type ... "
     make ${bin_tag} 1>make.log 2>&1
     if [ $? -ne 0 ]; then