Add deconts to nqp::eqaddr() tests

There are more places where this is needed.
Will try to remember to fix up those later, unless someone beats me.

Per: https://irclog.perlgeek.de/perl6-dev/2017-09-15#i_15169706

src/core/Any.pm

@@ -484,7 +484,7 @@ proto sub infix:<===>(Mu $?, Mu $?) is pure { * }
 multi sub infix:<===>($?)    { Bool::True }
 multi sub infix:<===>(\a, \b) {
     nqp::p6bool(
-      nqp::eqaddr(a,b)
+      nqp::eqaddr(nqp::decont(a),nqp::decont(b))
       || (nqp::eqaddr(a.WHAT,b.WHAT)
            && nqp::iseq_s(nqp::unbox_s(a.WHICH), nqp::unbox_s(b.WHICH)))
     )

src/core/Str.pm

@@ -3102,7 +3102,7 @@ sub substr-rw(\what, \start, $want?) is rw {
 multi sub infix:<eqv>(Str:D \a, Str:D \b) {
     nqp::p6bool(
       nqp::unless(
-        nqp::eqaddr(a,b),
+        nqp::eqaddr(nqp::decont(a),nqp::decont(b)),
         nqp::eqaddr(a.WHAT,b.WHAT) && nqp::iseq_s(a,b)
       )
     )