Use //third_party/fuchsia-sdk as the Fuchsia SDK path in order to match the Abseil main branch

Packages like Abseil that build in the Chromium tree expect the Fuchsia SDK to be located at //third_party/fuchsia-sdk.  But Flutter historically placed it at //fuchsia/sdk/linux.

This PR updates the Fuchsia SDK path in Flutter's Abseil branch so that Flutter can migrate to using //third_party/fuchsia-sdk

Change-Id: Ie1b9dd6b0b88c6556a1918ffff6745b44984980a
Reviewed-on: https://flutter-review.googlesource.com/c/third_party/abseil-cpp/+/71320
Reviewed-by: John McDole <codefu@google.com>
diff --git a/absl/time/internal/cctz/BUILD.gn b/absl/time/internal/cctz/BUILD.gn
index 375f604..3071b76 100644
--- a/absl/time/internal/cctz/BUILD.gn
+++ b/absl/time/internal/cctz/BUILD.gn
@@ -50,11 +50,11 @@
       "-Wno-sign-conversion",
     ]
     deps += [
-      "//fuchsia/sdk/$host_os/fidl/fuchsia.intl:fuchsia.intl_hlcpp",
-      "//fuchsia/sdk/$host_os/pkg/async",
-      "//fuchsia/sdk/$host_os/pkg/async-loop-cpp",
-      "//fuchsia/sdk/$host_os/pkg/sys_cpp",
-      "//fuchsia/sdk/$host_os/pkg/zx",
+      "//third_party/fuchsia-sdk/sdk/fidl/fuchsia.intl:fuchsia.intl_hlcpp",
+      "//third_party/fuchsia-sdk/sdk/pkg/async",
+      "//third_party/fuchsia-sdk/sdk/pkg/async-loop-cpp",
+      "//third_party/fuchsia-sdk/sdk/pkg/sys_cpp",
+      "//third_party/fuchsia-sdk/sdk/pkg/zx",
     ]
   }
 }