fix submodule

Author: perazz

src/stdlib_system_subprocess.F90

@@ -753,7 +753,7 @@ function getfile(fileName,err,delete) result(file)
     end function getfile
 
     !> Return process ID
-    integer(procesS_ID) function process_get_ID(process) result(ID)
+    module integer(procesS_ID) function process_get_ID(process) result(ID)
         class(process_type), intent(in) :: process
         ID = process%id
     end function process_get_ID