Function wait_shaderc_process

src/resource/shader_resource.cpp:727–737

	}

	static void wait_shaderc_process(CompileOptions &opts, Process &pr)
	{
		if (!pr.spawned())
			return;

		// Drain output before wait() when abandoning overlapping shaderc work.
		TempAllocator4096 ta;
		StringStream output(ta);
		opts.read_output(output, pr);
		pr.wait();
	}

	static void wait_shaderc_processes(CompileOptions &opts, Process *pr_vert, Process *pr_frag, u32 count)
	{