Bumped bootup memory limit on 32bit platforms using snapshot.

Somehow the mmaps we do look the same, but the info in the proc FS tells us that
we use a bit more memory. I am not sure if this is a real issue or not, but this
CL should at least get the build bots green again...

TBR=erik.corry@gmail.com
TEST=cctest/test-mark-compact/BootUpMemoryUse

Review URL: https://chromiumcodereview.appspot.com/10342016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11500 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/cctest/test-mark-compact.cc

@@ -540,7 +540,7 @@ TEST(BootUpMemoryUse) {
       }
     } else {
       if (v8::internal::Snapshot::IsEnabled()) {
-        CHECK_LE(booted_memory - initial_memory, 2600 * 1024);  // 2484.
+        CHECK_LE(booted_memory - initial_memory, 2800 * 1024);  // 2484.
       } else {
         CHECK_LE(booted_memory - initial_memory, 2950 * 1024);  // 2844
       }