firefox: fix builds on newer cbindgen.

extra/firefox/checksums

@@ -13,3 +13,4 @@ e24f71a6a0d8d4637b2081780c66b01be4eeb4dd496031270d0ae0b898be94d2  fix-tools.patc
 1d4a8f110d34da478f5597727eda9acacebd443dd86cce5bb64f898c01feabce  mallinfo.patch
 49b1c589bc3248fa6389c8b9ff9316c5c5f10cb7868436c9c47cab888bdc8df6  firefox-71-no-dbus.patch
 b050ee807c000f26d09ff0c3e79f0149f195d802efa92b8740a75e7f07267064  firefox-71-no-accessibility.patch
+5cb9b094229ea1b8e9d7361bbeeb26d43bc6247c7b2915aab490e46a3667e57b  firefox-fix-cbindgen.patch

extra/firefox/patches/firefox-fix-cbindgen.patch

@@ -0,0 +1,31 @@
+diff --git a/layout/generic/WritingModes.h b/layout/generic/WritingModes.h
+index 1a8d08b191..0671388902 100644
+--- a/layout/generic/WritingModes.h
++++ b/layout/generic/WritingModes.h
+@@ -518,7 +518,8 @@ class WritingMode {
+    */
+   void SetDirectionFromBidiLevel(uint8_t level) {
+     if (IS_LEVEL_RTL(level) == IsBidiLTR()) {
+-      mWritingMode ^= StyleWritingMode_RTL | StyleWritingMode_INLINE_REVERSED;
++      mWritingMode.bits ^= static_cast<uint8_t>(
++          (StyleWritingMode_RTL | StyleWritingMode_INLINE_REVERSED).bits);
+     }
+   }
+ 
+diff --git a/servo/ports/geckolib/cbindgen.toml b/servo/ports/geckolib/cbindgen.toml
+index bed86498ea..d675ba393d 100644
+--- a/servo/ports/geckolib/cbindgen.toml
++++ b/servo/ports/geckolib/cbindgen.toml
+@@ -617,12 +617,3 @@ renaming_overrides_prefixing = true
+   inline nsRect ToLayoutRect(nscoord aAutoSize = NS_MAXSIZE) const;
+ """
+ 
+-"WritingMode" = """
+-  StyleWritingMode operator^(const StyleWritingMode& other) const {
+-    return {static_cast<decltype(bits)>(this->bits ^ other.bits)};
+-  }
+-  StyleWritingMode& operator^=(const StyleWritingMode& other) {
+-    *this = (*this ^ other);
+-    return *this;
+-  }
+-"""

extra/firefox/sources

@@ -13,3 +13,4 @@ patches/fix-webrtc-glibcisms.patch
 patches/mallinfo.patch
 patches/firefox-71-no-dbus.patch
 patches/firefox-71-no-accessibility.patch
+patches/firefox-fix-cbindgen.patch

extra/firefox/version

@@ -1 +1 @@
-71.0 1
+71.0 2