* update webkit2gtk to 2.42.5-2

webkit2gtk/unused_variable.patch

@@ -0,0 +1,33 @@
+From c1f8a9e819201b59cacc047715b30dd2b4a1df30 Mon Sep 17 00:00:00 2001
+From: Yusuke Suzuki <ysuzuki@apple.com>
+Date: Mon, 22 Jan 2024 14:17:26 -0800
+Subject: [PATCH] Unreviewed, build fix for CLoop
+ https://bugs.webkit.org/show_bug.cgi?id=267881 rdar://121391447
+
+* Source/JavaScriptCore/llint/LowLevelInterpreter.cpp:
+(JSC::CLoop::execute):
+
+Canonical link: https://commits.webkit.org/273318@main
+---
+ Source/JavaScriptCore/llint/LowLevelInterpreter.cpp | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/Source/JavaScriptCore/llint/LowLevelInterpreter.cpp b/Source/JavaScriptCore/llint/LowLevelInterpreter.cpp
+index 769b582e754b9..75cecbbda6ec2 100644
+--- a/Source/JavaScriptCore/llint/LowLevelInterpreter.cpp
++++ b/Source/JavaScriptCore/llint/LowLevelInterpreter.cpp
+@@ -331,6 +331,14 @@ JSValue CLoop::execute(OpcodeID entryOpcodeID, void* executableAddress, VM* vm,
+     CLoopRegister metadataTable;
+     CLoopDoubleRegister d0, d1;
+ 
++    UNUSED_VARIABLE(t0);
++    UNUSED_VARIABLE(t1);
++    UNUSED_VARIABLE(t2);
++    UNUSED_VARIABLE(t3);
++    UNUSED_VARIABLE(t5);
++    UNUSED_VARIABLE(t6);
++    UNUSED_VARIABLE(t7);
++
+     struct StackPointerScope {
+         StackPointerScope(CLoopStack& stack)
+             : m_stack(stack)