On PPC the testcase CodeSerializerLargeCodeObject fails as
the object gets allocated in the code_space section of
the heap. This is because the code_space gets expanded
successfully to 1 page size (4MB on PPC) and can accommodate
the object (size=3784608 bytes). Increasing size of the compiled
source to (5096192 bytes) so that code_space is not expanded and
the space is allocated in the Large Object space of the heap.
Testcase was added as part of https://codereview.chromium.org/2226233002

R=mstarzinger@chromium.org, bmeurer@chromium.org

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2314843003
Cr-Commit-Position: refs/heads/master@{#39252}