[BETA] Update cargo

[ehuss]

• [beta] Partially revert dep changes in Fix doctests linking too many libs. cargo#5651 ([beta] Partially revert dep changes in #5651 cargo#5722)

[rust-highfive]

r? @nikomatsakis

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[rust-highfive]

Warning

• Pull requests are usually filed against the master branch for this repo, but this one is against beta. Please double check that you specified the right target!
• These commits modify submodules.

[ehuss]

r? @alexcrichton

[alexcrichton]

@bors: r+

[bors]

📌 Commit 28ecd38 has been approved by alexcrichton

[kennytm]

@bors p=1

[bors]

⌛ Testing commit 28ecd38 with merge 2867fb946d549a2753bd61c9a1622efea3f4cc47...

[bors]

💔 Test failed - status-travis

[rust-highfive]

The job dist-android of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

######################################################################    98.4%
######################################################################## 100.0%
[00:06:53] extracting /checkout/obj/build/cache/2018-06-21/rust-std-1.27.0-x86_64-unknown-linux-gnu.tar.gz
[00:06:53] downloading https://static.rust-lang.org/dist/2018-06-21/rustc-1.27.0-x86_64-unknown-linux-gnu.tar.gz
No output has been received in the last 30m0s, this potentially indicates a stalled build or something wrong with the build itself.
Check the details on how to adjust your build configuration on: https://docs.travis-ci.com/user/common-build-problems/#Build-times-out-because-no-output-was-received
The build has been terminated

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[kennytm]

@bors retry #40474

[bors]

⌛ Testing commit 28ecd38 with merge 655d22a...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: alexcrichton
Pushing 655d22a to beta...