Vulkan: Add a workaround for input_position on Adreno drivers

Adreno drivers will crash compiling geometry shaders if the input position is not wrapped in a gl_in struct.

src/shader_recompiler/backend/spirv/spirv_emit_context.h

@@ -280,6 +280,7 @@ public:
     Id write_global_func_u32x2{};
     Id write_global_func_u32x4{};
 
+    bool need_input_position_indirect{};
     Id input_position{};
     std::array<Id, 32> input_generics{};