Reduce egyptian_cotton thread stack size for running under IRT
Reduce egyptian_cotton thread stack size for running under IRT

Since the IRT takes up some of the address space, there is less room
for thread stacks.  We can get the standard number of threads if we
make the stacks smaller.

BUG=http://code.google.com/p/nativeclient/issues/detail?id=1890
TEST=none

R=bsy@google.com

Review URL: http://codereview.chromium.org/7452006

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@6163 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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