build: 0.11: change addExecutable signature

see ziglang/zig@71ff60f1265da83e619b1b6b2488ecb448fdfd36jk

Author: krichprollsch

build.zig

@@ -719,16 +719,18 @@ fn createBuildExeStep(b: *Builder, path: []const u8, target: std.zig.CrossTarget
     const i = std.mem.indexOf(u8, basename, ".zig") orelse basename.len;
     const name = basename[0..i];
 
-    const step = b.addExecutable(name, path);
-    step.setBuildMode(mode);
-    step.setTarget(target);
-
-    step.linkLibC();
-    step.addIncludePath("src");
-
     const output_dir_rel = std.fmt.allocPrint(b.allocator, "zig-out/{s}", .{name}) catch unreachable;
     const output_dir = b.pathFromRoot(output_dir_rel);
-    step.setOutputDir(output_dir);
+
+    const step = b.addExecutable(.{
+        .name = name,
+        .root_source_file = .{ .path = path },
+        .optimize = mode,
+        .target = target,
+        .link_libc = true,
+        .output_dir = output_dir,
+    });
+    step.addIncludePath(.{ .path = "src" });
 
     if (mode == .ReleaseSafe) {
         step.strip = true;