builder-module: Run shell before configure

Otherwise if the configure step fails, it impossible to open a shell in
the build environment

Fixes: #479

Author: koko-ng

src/builder-module.c

@@ -1892,6 +1892,13 @@ builder_module_build_helper (BuilderModule   *self,
         }
     }
 
+  if (run_shell)
+    {
+      if (!shell (app_dir, self->name, context, source_dir, build_dir_relative, build_args, env, error))
+        return FALSE;
+      return TRUE;
+    }
+
   if (configure_file)
     has_configure = g_file_query_exists (configure_file, NULL);
 
@@ -2125,13 +2132,6 @@ builder_module_build_helper (BuilderModule   *self,
       make_j = g_strdup ("-j1");
     }
 
-  if (run_shell)
-    {
-      if (!shell (app_dir, self->name, context, source_dir, build_dir_relative, build_args, env, error))
-        return FALSE;
-      return TRUE;
-    }
-
   /* Build and install */
 
   builder_set_term_title (_("Installing %s"), self->name);