Fix arm ncval build in build.sh r9593 broke the arm validator build for the case when build_arch != target_arch. (the build arch is never actually arm, but SConstruct and various parts of the TCB are confused about build_arch and target_arch). This CL makes the PNaCl build just use x86-32 as the scons build and target arch.
Fix arm ncval build in build.sh
r9593 broke the arm validator build for the case when build_arch != target_arch.
(the build arch is never actually arm, but SConstruct and various parts of the
TCB are confused about build_arch and target_arch). This CL makes the
PNaCl build just use x86-32 as the scons build and target arch.

See also http://code.google.com/p/nativeclient/issues/detail?id=2703 (but
no BUG= for it since this CL does not affect that bug)
BUG=none
R=jvoung@chromium.org,sehr@chromium.org,robertm@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10896044

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@9597 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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