stage1: update inline asm outputs to LLVM 14

LLVM pointers are transitioning to no longer have types, however, inline
assembly inputs and outputs which accept pointers need to know the
element type. So, inline assembly must be upgraded to add
elementtype(<ty>) annotations.

src/stage1/codegen.cpp

@@ -5575,6 +5575,7 @@ static LLVMValueRef ir_render_asm_gen(CodeGen *g, Stage1Air *executable, Stage1A
             buf_appendf(&constraint_buf, "=%s", buf_ptr(asm_output->constraint) + 1);
         } else {
             buf_appendf(&constraint_buf, "=*%s", buf_ptr(asm_output->constraint) + 1);
+            param_needs_attr[param_index] = true;
         }
         if (total_index + 1 < total_constraint_count) {
             buf_append_char(&constraint_buf, ',');