Oilpan: Decrease the size of s_gcInfoMap to avoid unacceptable increase of the bss size
Oilpan: Decrease the size of s_gcInfoMap to avoid unacceptable increase of the bss size

r187826 added s_gcInfoMap[1<<15] to a global region and it increased
the bss size unacceptably. This CL is a quick fix of the problem
by decreasing the size of s_gcInfoMap down to 1<<12.

This is never an ideal fix, but is needed to unblock a Blink roll.
(It is hard to revert r187826 because a bunch of CLs that depend on r187826
are already on trunk.)

BUG=420515

Review URL: https://codereview.chromium.org/823283003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@187893 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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