Allow local build and test of pnacl toolchains to use 32 or 64 bit host binaries This should allow build.sh everything (and subsequent toolchain use) to just work, regardless of build arch, without any special environment, and still support manually specifying the host arch for LLVM and driver installs.
Allow local build and test of pnacl toolchains to use 32 or 64 bit host binaries
This should allow build.sh everything (and subsequent toolchain use) to just
work, regardless of build arch, without any special environment,
and still support manually specifying the host arch for LLVM and driver
installs.

R=jvoung@chromium.org,robertm@chromium.org,sehr@chromium.org,mseaborn@chromium.org
BUG=none
TEST=local build of pnacl

Review URL: https://codereview.chromium.org/11017038

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@9962 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client