Bump binary submodule to 0.8.6.0

This is actually a decrease in the version number since a bump to 0.10
wasn't actually necessary.

(cherry picked from commit 960a7d17a79417300ee81e884e867bf3de4e535b)

compiler/ghc.cabal.in

@@ -54,7 +54,7 @@ Library
                    directory  >= 1   && < 1.4,
                    process    >= 1   && < 1.7,
                    bytestring >= 0.9 && < 0.11,
-                   binary     == 0.10.*,
+                   binary     == 0.8.*,
                    time       >= 1.4 && < 1.9,
                    containers >= 0.5 && < 0.7,
                    array      >= 0.1 && < 0.6,

binary @ 38adf7ce

-Subproject commit b5a2454e331ba516a14bed77e30f7ef8251eea48
+Subproject commit 38adf7ce1ad6a497fba61de500c3f35b186303a9

libraries/ghc-boot/ghc-boot.cabal.in

@@ -43,7 +43,7 @@ Library
             GHC.HandleEncoding
 
     build-depends: base       >= 4.7 && < 4.13,
-                   binary     == 0.10.*,
+                   binary     == 0.8.*,
                    bytestring == 0.10.*,
                    directory  >= 1.2 && < 1.4,
                    filepath   >= 1.3 && < 1.5,

libraries/ghci/ghci.cabal.in

@@ -70,7 +70,7 @@ library
     Build-Depends:
         array            == 0.5.*,
         base             >= 4.8 && < 4.13,
-        binary           == 0.10.*,
+        binary           == 0.8.*,
         bytestring       == 0.10.*,
         containers       >= 0.5 && < 0.7,
         deepseq          == 1.4.*,