Auto merge of #14224 - heycam:bindings-update-6, r=shinglyu

Regenerate bindings.

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r? @shinglyu

The oldest commit is from #14220 which hasn't merged yet.  The second commit is the update for the sync: https://treeherder.mozilla.org/#/jobs?repo=stylo&revision=88d68e17f03c1f8b9f688081902a3369ea83e627

The newest commit is just regenerating bindings again with an updated rust-bindgen (since the previous few bindings updates were done with an old rust-bindgen).

I ran `./mach test-stylo` and all the tests pass.

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- [ ] `./mach test-tidy` does not report any errors
- [ ] These changes fix #__ (github issue number if applicable).

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components/style/gecko_bindings/bindings.rs

@@ -915,6 +915,10 @@ extern "C" {
 extern "C" {
     pub fn Servo_Node_ClearNodeData(node: RawGeckoNodeBorrowed);
 }
+extern "C" {
+    pub fn Servo_StyleSheet_Empty(parsing_mode: SheetParsingMode)
+     -> RawServoStyleSheetStrong;
+}
 extern "C" {
     pub fn Servo_StyleSheet_FromUTF8Bytes(data: *const nsACString_internal,
                                           parsing_mode: SheetParsingMode,