walleye: move bootctrl to device specific trees

Since we've adapted libgpt-utils to specific trees, bootctrl needs that too.

Android.bp

@@ -1,5 +1,6 @@
 soong_namespace {
     imports: [
         "hardware/google/pixel",
+        "hardware/qcom/bootctrl",
     ],
 }

bootctrl/Android.bp

@@ -0,0 +1,21 @@
+//
+// Copyright (C) 2019 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 {
+    name: "bootctrl.msm8998",
+    defaults: ["bootctrl_hal_defaults"],
+    static_libs: ["libgptutils.msm8998"],
+}