build: add build rules for X10 supplementary modules (tensorflow#1177)

* build: add build rules for X10 supplementary modules

Add support to build:
- x10_optimizers_optimizer
- x10_optimizers_tensor_visitor_plan
- x10_trailing_loop

These are used by some dependent projects (such as the BERT CoLA model).

* build: disable x10_testing_loop

For some reason, this triggers a failure in SwiftPM.  Disable the
x10_testing_loop to enable the other required optimizers.

Author: compnerd

Package.swift

@@ -31,6 +31,18 @@ let package = Package(
       name: "Tensor",
       type: .dynamic,
       targets: ["Tensor"]),
+    .library(
+      name: "x10_optimizers_optimizer",
+      type: .dynamic,
+      targets: ["x10_optimizers_optimizer"]),
+    .library(
+      name: "x10_optimizers_tensor_visitor_plan",
+      type: .dynamic,
+      targets: ["x10_optimizers_tensor_visitor_plan"]),
+    // .library(
+    //   name: "x10_training_loop",
+    //   type: .dynamic,
+    //   targets: ["x10_training_loop"]),
   ],
   dependencies: [
     .package(url: "https://github.com/apple/swift-numerics", .branch("main")),
@@ -59,6 +71,31 @@ let package = Package(
         .define("USING_X10_BACKEND"),
         .define("DEFAULT_BACKEND_EAGER"),
       ]),
+    .target(
+      name: "x10_optimizers_tensor_visitor_plan",
+      dependencies: ["TensorFlow"],
+      path: "Sources/x10",
+      sources: [
+        "swift_bindings/optimizers/TensorVisitorPlan.swift",
+      ]),
+    .target(
+      name: "x10_optimizers_optimizer",
+      dependencies: [
+        "x10_optimizers_tensor_visitor_plan",
+        "TensorFlow",
+      ],
+      path: "Sources/x10",
+      sources: [
+        "swift_bindings/optimizers/Optimizer.swift",
+        "swift_bindings/optimizers/Optimizers.swift",
+      ]),
+    // .target(
+    //   name: "x10_training_loop",
+    //   dependencies: ["TensorFlow"],
+    //   path: "Sources/x10",
+    //   sources: [
+    //     "swift_bindings/training_loop.swift",
+    //   ]),
     .target(
       name: "Experimental",
       dependencies: [],