add 64-bit variety NDK packages to download table. Use same naming convention as SDK packages for consistency.
add 64-bit variety NDK packages to download table.
Use same naming convention as SDK packages for consistency.

Change-Id: Iee2673d6c9a4b313988e1a73966d2a0fbee27c2c

xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build