Use pointer sized alignment for fat function pointers since they cont…

…ain absolute relocations. ld64 seem to silently corrupt them if they are not aligned to pointer size.

src/coreclr/tools/aot/ILCompiler.Compiler/Compiler/DependencyAnalysis/FatFunctionPointerNode.cs

@@ -60,8 +60,9 @@ public override ObjectData GetData(NodeFactory factory, bool relocsOnly = false)
         {
             var builder = new ObjectDataBuilder(factory, relocsOnly);
 
-            // These need to be aligned the same as methods because they show up in same contexts
-            builder.RequireInitialAlignment(factory.Target.MinimumFunctionAlignment);
+            // These need to be aligned the same as method pointers because they show up in same contexts
+            // (macOS ARM64 has even stricter alignment requirement for the linker, so round up to pointer size)
+            builder.RequireInitialAlignment(factory.Target.PointerSize);
 
             builder.AddSymbol(this);