[commit: ghc] ghc-8.2: Update xhtml submodule to potential 3000.2.2 release commit (28802ac)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : ghc-8.2
Link       : http://ghc.haskell.org/trac/ghc/changeset/28802acf2690a111e34ba1bd8a1e054fcce2cf93/ghc

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commit 28802acf2690a111e34ba1bd8a1e054fcce2cf93
Author: Herbert Valerio Riedel <hvr at gnu.org>
Date:   Tue Apr 18 17:22:50 2017 +0200

    Update xhtml submodule to potential 3000.2.2 release commit
    
    (cherry picked from commit 765a2e71f3dcc35fbe4b70677a67613c285dce60)


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28802acf2690a111e34ba1bd8a1e054fcce2cf93
 libraries/xhtml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/xhtml b/libraries/xhtml
index 45e5cb8..8a8c8a4 160000
--- a/libraries/xhtml
+++ b/libraries/xhtml
@@ -1 +1 @@
-Subproject commit 45e5cb820a129780407bc37968364e4f64174f7d
+Subproject commit 8a8c8a48bac2d3ed306b610a2e9fa393b5a7ffa5