Remove i686-hosted Linux build and start switching to new directory layout

pnacl/build.sh

 #!/bin/bash
 # Copyright (c) 2012 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 #@                 PNaCl toolchain build script
 #@-------------------------------------------------------------------
 #@ This script builds the ARM and PNaCl untrusted toolchains.
 #@ It MUST be run from the native_client/ directory.
 ######################################################################
@@ skipping 129 matching lines @@
 
 # PNaCl client-translators (sandboxed) binary locations
 readonly INSTALL_TRANSLATOR="${TOOLCHAIN_BASE}/pnacl_translator"
 
 
 # The INSTALL_HOST directory has host binaries and libs which
 # are part of the toolchain (e.g. llvm and binutils).
 # There are also tools-x86 and tools-arm which have host binaries which
 # are not part of the toolchain but might be useful in the SDK, e.g.
 # arm sel_ldr and x86-hosted arm/mips validators.
-readonly INSTALL_HOST="${INSTALL_ROOT}/host_${HOST_ARCH}"
+readonly INSTALL_HOST="${INSTALL_ROOT}"
 
 # Component installation directories
 readonly LLVM_INSTALL_DIR="${INSTALL_HOST}"
 readonly BINUTILS_INSTALL_DIR="${INSTALL_HOST}"
 readonly BFD_PLUGIN_DIR="${BINUTILS_INSTALL_DIR}/lib/bfd-plugins"
 readonly FAKE_INSTALL_DIR="${INSTALL_HOST}/fake"
 NEWLIB_INSTALL_DIR="${INSTALL_ROOT}/usr"
 
 # Location of the PNaCl tools defined for configure invocations.
 readonly PNACL_CC="${INSTALL_BIN}/pnacl-clang"
@@ skipping 3207 matching lines @@
 
 if [ "$(type -t $1)" != "function" ]; then
   #Usage
   echo "ERROR: unknown function '$1'." >&2
   echo "For help, try:"
   echo "    $0 help"
   exit 1
 fi
 
 "$@"