Roll Fuchsia SDK to 492eec9e40c9832dd8772f4718b7db6aac4d7921

In the new SDK:
 - NIC indices are 1-based now, which is useful for multicast UDP
   socket (for details see
   https://chromium-review.googlesource.com/c/chromium/src/+/729538)
 - LP_CLONE_FDIO_CWD was removed.

[email protected]

Bug: 707030, 768916
Change-Id: If282c06ea01e7ec5e8f77d312529340e35ecc868
Reviewed-on: https://chromium-review.googlesource.com/731671
Commit-Queue: Sergey Ulanov <[email protected]>
Reviewed-by: Nico Weber <[email protected]>
Reviewed-by: Wez <[email protected]>
Reviewed-by: Sergey Ulanov <[email protected]>
Reviewed-by: Kevin Marshall <[email protected]>
Cr-Commit-Position: refs/heads/master@{#510660}
diff --git a/DEPS b/DEPS
index 697e367..359b1ec 100644
--- a/DEPS
+++ b/DEPS
@@ -1421,7 +1421,7 @@
     'action': [
       'python',
       'src/build/fuchsia/update_sdk.py',
-      'bb7a8c4be8001868468ba0a76389ce4ee111620c',
+      '492eec9e40c9832dd8772f4718b7db6aac4d7921',
     ],
   },