Make mkbootfs self-contained

Now that mkbootfs is in prebuilt build tools, make it have no dynamic
dependency so that the binary is portable.

Bug: 184490452
Test: Presubmit
Change-Id: Ida4ee9af3c51ba9d163cf9c1e7b7098fd24e0de1
diff --git a/cpio/Android.bp b/cpio/Android.bp
index 16af079..cd2a624 100644
--- a/cpio/Android.bp
+++ b/cpio/Android.bp
@@ -8,7 +8,11 @@
     name: "mkbootfs",
     srcs: ["mkbootfs.c"],
     cflags: ["-Werror"],
-    shared_libs: ["libcutils"],
+    static_libs: [
+        "libbase",
+        "libcutils",
+        "liblog",
+    ],
     dist: {
         targets: ["dist_files"],
     },