Make libpng buildable for native_bridge

Bug: http://b/153609531

Test: m libpng.native_bridge

Change-Id: Icdaec158a0a9fb2f0c3bdf0796e834346578e620
Merged-In: Icdaec158a0a9fb2f0c3bdf0796e834346578e620
1 file changed