edify: Export the header and move to Soong.

Also make matching changes to applypatch modules which include
edify/expr.h.

Test: mmma bootable/recovery
Change-Id: Ia72be3caa010d7f56a70add2da345e631b306378
diff --git a/edify/Android.bp b/edify/Android.bp
new file mode 100644
index 0000000..42947eb
--- /dev/null
+++ b/edify/Android.bp
@@ -0,0 +1,45 @@
+// Copyright (C) 2017 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+cc_library_static {
+    name: "libedify",
+
+    host_supported: true,
+
+    srcs: [
+        "expr.cpp",
+        "lexer.ll",
+        "parser.yy",
+    ],
+
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-Wno-deprecated-register",
+        "-Wno-unused-parameter",
+    ],
+
+    export_include_dirs: [
+        "include",
+    ],
+
+    local_include_dirs: [
+        "include",
+    ],
+
+    static_libs: [
+        "libbase",
+        "libotautil",
+    ],
+}