fix: mv vimrc in vim test

lfs/vim-9.1.1629.PKGBUILD

@@ -42,11 +42,17 @@ src_build() {
 src_check() {
   leaf_record_message "Tests require at least 24 lines with 80 characters."
   leaf_record_message "Test_write_backup_symlink is known to fail if BUILD_DIR is under /tmp."
+  if [[ -f /etc/vimrc ]]; then
+    mv -v /etc/vimrc /etc/vimrc.old
+  fi
   chown -R leaf .
   sed '/test_plugin_glvs/d' -i src/testdir/Make_all.mak
   echo "Testing... May take a while..."
   su leaf -c "TERM=xterm-256color LANG=en_US.UTF-8 make -j1 test" \
    &> vim-test.log
+  if [[ -f /etc/vimrc.old ]]; then
+    mv -v /etc/vimrc.old /etc/vimrc
+  fi
 }
 
 src_install() {