Merging r353551 and r353809:

Also removed the text about Clang 9.

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r353551 | metzman | 2019-02-08 20:35:04 +0100 (Fri, 08 Feb 2019) | 13 lines

Document libFuzzer on Windows.

Summary:
Document that libFuzzer supports Windows, how to get it,
and its limitations.

Reviewers: kcc, morehouse, rnk, metzman

Reviewed By: kcc, rnk, metzman

Subscribers: hans, rnk

Differential Revision: https://reviews.llvm.org/D57597
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r353809 | hans | 2019-02-12 10:08:52 +0100 (Tue, 12 Feb 2019) | 1 line

LibFuzzer.rst: double backticks
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llvm-svn: 353811