config: swap to glibc 2.17

**Please do not revert this change without consulting with either
srhines@ or gbiv@ first. It's a large change, and if it only causes
simple/small breakages, we plan to fix those as they pop up.**

This CL swaps the host Android Linux toolchain to gcc 4.8.3 + glibc
2.17, landed in Ieeed444801160e3d288bbad7d871067e81411118.

Bug: 111358231
Test: We've done extensive testing on internal master. Please see
      Ieeed444801160e3d288bbad7d871067e81411118.
Change-Id: If991a603a3dce33b55086672c27a11992f0f3123