testsuite: Split out Windows allocations numbers for T12234
testsuite: Split out Windows allocations numbers for T12234

sdiehl/ghc,shlevy/ghc,sdiehl/ghc,shlevy/ghc,sdiehl/ghc,olsner/ghc,olsner/ghc,olsner/ghc,sdiehl/ghc,sdiehl/ghc,olsner/ghc,olsner/ghc,shlevy/ghc,shlevy/ghc,shlevy/ghc,sdiehl/ghc,ezyang/ghc,ezyang/ghc,olsner/ghc,sdiehl/ghc,shlevy/ghc,olsner/ghc,ezyang/ghc,ezyang/ghc,shlevy/ghc,ezyang/ghc,ezyang/ghc,ezyang/ghc