Move partner androidmk and bpfix files to match their package path

Using a gomod-aware editor with build/soong requires that files
in build/soong can be mapped to the android/soong package path.
Move the partner androidmk and bpfix files such that their path
matches the package path when the android/soong package prefix is
replaced with the build/soong path prefix.

Test: go test ./...
Test: m bpfix androidmk partner_bpfix partner_androidmk
Change-Id: Ic7f7aad9e5eb9178eef0383f0b37e4fb93ce8314

partner/Android.bp

@@ -0,0 +1,49 @@
+// Copyright 2019 Google Inc. All rights reserved.
+//
+// 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.
+
+//
+// Sample project for creating an extended androidmk
+//
+
+blueprint_go_binary {
+    name: "partner_androidmk",
+    srcs: [
+        "androidmk/androidmk.go",
+    ],
+    testSrcs: [
+        "androidmk/androidmk_test.go",
+    ],
+    deps: [
+        "androidmk-lib",
+        "partner-bpfix-extensions",
+    ],
+}
+
+blueprint_go_binary {
+    name: "partner_bpfix",
+    srcs: [
+        "bpfix/bpfix.go",
+    ],
+    deps: [
+        "bpfix-cmd",
+        "partner-bpfix-extensions",
+    ],
+}
+
+bootstrap_go_package {
+    name: "partner-bpfix-extensions",
+    pkgPath: "android/soong/partner/bpfix/extensions",
+    srcs: ["bpfix/extensions/headers.go"],
+    deps: ["bpfix-lib"],
+}