newfs_msdos: switch to external/newfs_msdos.

Bug: http://b/29899852
Test: builds
Change-Id: Iecd80d0c64cb5eec4c76ba4bce775508ee45df49
diff --git a/shell_and_utilities/Android.bp b/shell_and_utilities/Android.bp
index 2e42b70..c1cd3e0 100644
--- a/shell_and_utilities/Android.bp
+++ b/shell_and_utilities/Android.bp
@@ -10,6 +10,7 @@
         "logwrapper_vendor",
         "mkshrc",
         "mkshrc_vendor",
+        "newfs_msdos",
         "reboot",
         "sh",
         "sh_vendor",