Merge pull request ocaml#15704 from philzook58/master

Update Z3 to 4.8.7

packages/z3/z3.4.8.7/opam

@@ -0,0 +1,28 @@
+opam-version: "2.0"
+maintainer: "[email protected]"
+authors: "MSR"
+homepage: "https://github.com/Z3prover/z3"
+bug-reports: "https://github.com/Z3prover/z3/issues"
+license: "MIT"
+dev-repo: "git+https://github.com/Z3prover/z3.git"
+build: [
+  [ "python2.7" "scripts/mk_make.py" "--ml" "--staticlib" ]
+  [ make "-C" "build" "-j" jobs ]
+]
+install: [
+  [ "sh" "-c" "ocamlfind install z3 build/api/ml/META -nodll build/libz3* build/api/ml/*" ]
+]
+depends: [
+  "ocaml"
+  "ocamlfind" {build}
+  "zarith"
+  "conf-gmp"
+  "conf-python-2-7" {build}
+]
+synopsis: "Z3 solver"
+url {
+  src:
+    "https://github.com/Z3Prover/z3/archive/z3-4.8.7.tar.gz"
+  checksum: "md5=18e7332ab136c1d8686ea719ed7107ed"
+
+}