Slightly bump memory test limit for ia32 no-snapshot.
Slightly bump memory test limit for ia32 no-snapshot.

R=verwaest@chromium.org
TEST=cctest/test-mark-compact/BootUpMemoryUse

Review URL: https://codereview.chromium.org/12091088

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@13568 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh