add: use shell to replace generate .a

src/staden/gen_a.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+#
+for fortran in $(ls *.f)
+do 
+  mkdir -p ${fortran%??}
+  cp $fortran ${fortran%??}
+
+  cd ${fortran%??}
+  fsplit ${fortran}
+  rm ${fortran}
+
+  gfortran  -g -fdec -std=legacy -C -c *.f
+  ar rcv ${fortran%??}.a *.o
+  ranlib ${fortran%??}.a
+
+  cd ..
+  cp ${fortran%??}/*.a .
+  rm -rf ${fortran%??}
+done