cmd/link: add info.plist support via plist linker option

[EdSchouten]

This change adds a flag to the linker to allow it to embed info.plist data into the resulting binaries. This can, for example, be used to add code signing properties to binaries.

[gopherbot]

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[gopherbot]

Message from Than McIntosh:

Patch Set 1: Run-TryBot+1

(2 comments)

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[gopherbot]

Message from Gopher Robot:

Patch Set 1:

(1 comment)

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[gopherbot]

Message from Gopher Robot:

Patch Set 1:

(1 comment)

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[gopherbot]

Message from Gopher Robot:

Patch Set 1: TryBot-Result-1

(1 comment)

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[gopherbot]

This PR (HEAD: 29b7c5c) has been imported to Gerrit for code review.

Please visit Gerrit at https://go-review.googlesource.com/c/go/+/519135.

Important tips:

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• To change your code in response to feedback:
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• The title and description of the GitHub PR are used to construct the final commit message.
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[gopherbot]

Message from Ed Schouten:

Patch Set 1:

(1 comment)

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[gopherbot]

Message from Cherry Mui:

Patch Set 2:

(8 comments)

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