This appears to stem from the way the PhysX libs are compiled for x86 on Android.
UnrealBuildTool: C:/UE4/UnrealEngine/Engine/Source/ThirdParty/PhysX/PhysX-3.3/lib/Android/x86/libPhysX3PROFILE.a(NpPhysics.cpp.o):NpPhysics.cpp:function physx::NpPhysics::createInstance(unsigned int, physx::PxFoundation&, physx::PxTolerancesScale const&, b
MainFrameActions: Packaging (Android (ETC1)): ool, physx::PxProfileZoneManager*): error: undefined reference to '__stack_chk_fail_local'
MainFrameActions: Packaging (Android (ETC1)): UnrealBuildTool: C:/UE4/UnrealEngine/Engine/Source/ThirdParty/PhysX/PhysX-3.3/lib/Android/x86/libPhysX3PROFILE.a(NpScene.cpp.o):NpScene.cpp:function void physx::shdfnd::sort<void*, physx::shdfnd::Less<void*>, physx::shdfnd::ReflectionAllocator<physx::Cm::Block<unsigned char, 256u> > >(void**, unsigned int, physx::shdfnd::Less<void*> const&, physx::shdfnd::ReflectionAllocator<physx::Cm::Block<unsigned char, 256u> > const&) [clone .isra.537]: error: undefined reference to '__stack_chk_fail_local'
MainFrameActions: Packaging (Android (ETC1)): UnrealBuildTool: C:/UE4/UnrealEngine/Engine/Source/ThirdParty/PhysX/PhysX-3.3/lib/Android/x86/libPhysX3PROFILE.a(NpScene.cpp.o):NpScene.cpp:function void physx::shdfnd::sort<void*, physx::shdfnd::Less<void*>, physx::shdfnd::ReflectionAllocator<physx::Cm::Block<unsigned char, 384u> > >(void**, unsigned int, physx::shdfnd::Less<void*> const&, physx::shdfnd::ReflectionAllocator<physx::Cm::Block<unsigned char, 384u> > const&) [clone .isra.540]: error: undefined reference to '__stack_chk_fail_local'
MainFrameActions: Packaging (Android (ETC1)): UnrealBuildTool: C:/UE4/UnrealEngine/Engine/Source/ThirdParty/PhysX/PhysX-3.3/lib/Android/x86/libPhysX3PROFILE.a(NpScene.cpp.o):NpScene.cpp:function void physx::shdfnd::sort<void*, physx::shdfnd::Less<void*>, physx::shdfnd::ReflectionAllocator<physx::Cm::B
MainFrameActions: Packaging (Android (ETC1)): lock<unsigned char, 128u> > >(void**, unsigned int, physx::shdfnd::Less<void*> const&, physx::shdfnd::ReflectionAllocator<physx::Cm::Block<unsigned char, 128u> > const&) [clone .isra.534]: error: undefined reference to '__stack_chk_fail_local'
MainFrameActions: Packaging (Android (ETC1)): UnrealBuildTool: clang++.exe: error: linker command failed with exit code 1 (use -v to see invocation)