Merging r322984:

Merging r322984:
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r322984 | rtrieu | 2018-01-19 21:46:19 +0100 (Fri, 19 Jan 2018) | 7 lines

Allow BlockDecl in CXXRecord scope to have no access specifier.

Using a BlockDecl in a default member initializer causes it to be attached to
CXXMethodDecl without its access specifier being set.  This prevents a crash
where getAccess is called on this BlockDecl, since that method expects any
Decl in CXXRecord scope to have an access specifier.

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git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_60@323108 91177308-0d34-0410-b5e6-96231b3b80d8