Recursively search for TranslateC steps

[ypsvlq]

zig-android-sdk/src/androidbuild/Apk.zig

Lines 510 to 531 in a73fc01

	// Find TranslateC dependencies and add system path
	var iter = artifact.root_module.import_table.iterator();
	while (iter.next()) |it| {
	const module = it.value_ptr.*;
	const root_source_file = module.root_source_file orelse continue;
	switch (root_source_file) {
	.generated => |gen| {
	const step = gen.file.step;
	if (step.id != .translate_c) {
	continue;
	}
	const c_translate_target = module.resolved_target orelse continue;
	if (!c_translate_target.result.abi.isAndroid()) {
	continue;
	}
	const translate_c: *std.Build.Step.TranslateC = @fieldParentPtr("step", step);
	translate_c.addIncludePath(.{ .cwd_relative = apk.ndk.include_path });
	translate_c.addSystemIncludePath(.{ .cwd_relative = apk.getSystemIncludePath(c_translate_target) });
	},
	else => continue,
	}
	}

This does not work for TranslateC steps in dependencies of the root module.

As std.Build.Step.TranslateC is also going to be removed in favour of a package, it might be preferable to add a public API to get the include paths for a given target.

[silbinarywolf]

@ypsvlq Raised a seperate issue on adding a public API for getting include paths, etc: #93

[silbinarywolf]

@ypsvlq Apologies, I didn't notice you mentioned it wouldn't work for recursive modules, I've now got a PR for fixing that too: #94 and then test coverage here (for the external dependency version at least): #95