Bump Iris.

And revert some changes due to stdpp!80

opam

@@ -9,5 +9,5 @@ build: [make "-j%{jobs}%"]
 install: [make "install"]
 remove: [ "sh" "-c" "rm -rf '%{lib}%/coq/user-contrib/iris-c" ]
 depends: [
-  "coq-iris" { (= "dev.2019-06-26.0.ad3e5066") | (= "dev") }
+  "coq-iris" { (= "dev.2019-06-26.1.4832f461") | (= "dev") }
 ]

theories/lib/mset.v

@@ -50,7 +50,7 @@ Section mset.
     iIntros (<- Hvc Φ) "Hmut HΦ". iDestruct "Hmut" as (l hd vs (->&->&?&?)) "Hl".
     wp_lam; wp_pures. wp_load. wp_let.
     wp_apply (llist_member_spec with "[//]"). iIntros "_".
-    rewrite (bool_decide_iff _ (v ∈ val_for_compare <$> vs)); last set_solver -Hvc.
+    rewrite (bool_decide_iff _ (v ∈ val_for_compare <$> vs)); last set_solver.
     rewrite Hvc. iApply "HΦ". iExists l, hd, vs; auto.
   Qed.
 
@@ -65,7 +65,7 @@ Section mset.
     iIntros (<- Hvc ? Φ) "Hmut HΦ". iDestruct "Hmut" as (l hd vs (->&->&?&?)) "Hl".
     wp_lam. wp_pures. wp_load. wp_let. wp_apply wp_assert.
     wp_apply (llist_member_spec with "[//]"); iIntros "_".
-    rewrite Hvc bool_decide_false /=; last set_solver -Hvc. wp_op; iSplit=> //; iIntros "!>".
+    rewrite Hvc bool_decide_false /=; last set_solver. wp_op; iSplit=> //; iIntros "!>".
     wp_seq. wp_apply (lcons_spec with "[//]"); iIntros (hd' ?). wp_store.
     iApply "HΦ". iExists l, hd', (v :: vs). iFrame "Hl".
     rewrite NoDup_cons fmap_cons Hvc. assert (v ∉ vs).