Update NDK prebuilts to build 4949434.

Taken from branch aosp-master.

Bug: none
Test: run test.py on linux.

Change-Id: I197ac938ff07f2b7efa976564880809c30d39b4f
(cherry picked from commit 2239807ec821e23c30131610029b32287bc9f2f3)
17 files changed