Added zig source as well

Why not, it was due for long time.  If you guys manage to find
exploits some how, please send than use them malciouly.

genserve/build.zig

@@ -0,0 +1,18 @@
+const std = @import("std");
+
+// zig fetch --save git+https://github.com/karlseguin/http.zig#master
+
+pub fn build(b: *std.Build) void {
+    const exe = b.addExecutable(.{
+        .name = "genserve",
+        .root_source_file = b.path("src/main.zig"),
+        .target = b.graph.host,
+    });
+    const httpz = b.dependency("httpz", .{
+	.target = b.graph.host,
+	// .optimize = .standardOptimizeOption
+    });
+
+    exe.root_module.addImport("httpz", httpz.module("httpz"));
+    b.installArtifact(exe);
+}