Upgrade host tool to x86_64-linux-glibc2.15-4.8

BUG: 17915392
Change-Id: I301b8ae70fabedfafea5ae0094bbd46c208f4622
Remove logic for libstdc++ gtest libs.

The libstdc++ linked gtest libraries are no longer necessary.

Change-Id: Ia98263bc2541b6c8fd0b3e22bb6fec85104a2210
Merge "Remove logic for libstdc++ gtest libs."
kill HAVE_SCHED_SETSCHEDULER

Bug: 18300670
Change-Id: I66fb3d0070751ffaa2bc6b53274b22d967350312
Merge "kill HAVE_SCHED_SETSCHEDULER"
kill OS_CASE_SENSITIVE

Bug: 18314594
Change-Id: I5dc5072d43299c0e5d96ce9640e8405cbb633506
kill HAVE_STAT_ST_MTIM

Bug: 18300671
Change-Id: I92b5691924b995d9c883fc0f777c566ac4c35d1d
Remove HAVE_DIRENT_D_TYPE.

Only Windows doesn't have it, and we don't build atree for Windows.

Change-Id: Ib6e96be73340c36cdfcb3654ed540f690bf7550b
kill HAVE_INOTIFY

Bug: 18314841
Change-Id: Idfcbeb62a57f72a47eb732f085fbd1ab27302f85
Merge "Remove HAVE_DIRENT_D_TYPE."
Merge "kill HAVE_STAT_ST_MTIM"
Merge "kill HAVE_INOTIFY"
Merge "kill OS_CASE_SENSITIVE"
remove __linux__ in AndroidConfig.h

Bug: 18316409
Change-Id: If6644074ec86efc2f9f91a98bf82fe26be6f66d3
Remove unused variables from select.mk.

I've no idea what these were meant to be for, but they're unused.

Change-Id: I978568bd83f91eb952c35a3a481bd517312062f0
Merge "remove __linux__ in AndroidConfig.h"
Merge "Remove unused variables from select.mk."
kill HAVE_POSIX_FILEMAP

Bug: 18315579
Change-Id: I7a20ad40dc0ec121f0e84202831e6019005104e7
Use platform protobuf unless building with NDK.

The NDK protobuf library depends on the final target linking stlport
(since it is a static library). Since the platform stlport is going
away, we need to use a separate version of the protobuf library that
is compiled for the platform against libc++.

Note that this should be the case for _all_ libraries built with the
NDK. If a library needs to be used by both an NDK built final target
and a platform built final target, there should be both an NDK and
platform version of the library.

Bug: 15193147
Change-Id: I0ead61c2d1cd9d0248b304ab7d8682dedd6e8366
Merge "Use platform protobuf unless building with NDK."