Bump allocations for T6048
Bump allocations for T6048

This occassionally fails with allocations a few tenths of a percent
above threshold. Sadly there isn't a clear cause; it's likely just the
result of gradual creep, further underscoring the need for more regular
performance characterization.

(cherry picked from commit 7ba817c217d3c5c4dd9550b0cf0f4314b54895a3)

GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc