[fuchsia] Add support for libs in packages (#10081)

shell/platform/fuchsia/flutter/BUILD.gn

@@ -193,6 +193,35 @@ template("jit_runner") {
       },
     ]
 
+    fuchsia_sdk_lib = "//fuchsia/sdk/$host_os/arch/$host_cpu/lib"
+
+    libraries = [
+      {
+        name = "libasync-default.so"
+        path = rebase_path("$fuchsia_sdk_lib")
+      },
+      {
+        name = "libtrace-engine.so"
+        path = rebase_path("$fuchsia_sdk_lib")
+      },
+      {
+        name = "libfdio.so"
+        path = rebase_path("$fuchsia_sdk_lib")
+      },
+      {
+        name = "libmemfs.so"
+        path = rebase_path("$fuchsia_sdk_lib")
+      },
+      {
+        name = "libsyslog.so"
+        path = rebase_path("$fuchsia_sdk_lib")
+      },
+      {
+        name = "libvulkan.so"
+        path = rebase_path("$fuchsia_sdk_lib")
+      },
+    ]
+
     meta = [
       {
         path = rebase_path("meta/flutter_jit${product_suffix}_runner.cmx")

tools/fuchsia/package_dir.gni

@@ -17,6 +17,7 @@ template("package_dir") {
                              "deps",
                              "meta",
                              "resources",
+                             "libraries",
                            ])
     if (!defined(package_name)) {
       package_name = pkg_target_name
@@ -30,6 +31,9 @@ template("package_dir") {
     if (!defined(resources)) {
       resources = []
     }
+    if (!defined(libraries)) {
+      libraries = []
+    }
   }
 
   far_base_dir = "$root_out_dir/${pkg_target_name}_far"
@@ -42,6 +46,11 @@ template("package_dir") {
     copy_outputs += [ "$far_base_dir/data/${res.dest}" ]
   }
 
+  foreach(lib, pkg.libraries) {
+    copy_sources += [ "${lib.path}/${lib.name}" ]
+    copy_outputs += [ "$far_base_dir/lib/${lib.name}" ]
+  }
+
   action(target_name) {
     script = "$flutter_root/tools/fuchsia/copy_path.py"
     response_file_contents = rebase_path(copy_sources + copy_outputs)