Execute on platforms where UseUnalignedAccesses is false:

$ make test TEST="compiler/escapeAnalysis/TestRematerializeObjects.java"

Two IR rules failed under -XX:-EliminateAllocations on platforms with -XX:-UseUnalignedAccesses.
These are expecting MergeStores to emit StoreL or StoreI. But the enablement of MergeStores depends
on flag UseUnalignedAccesses [1]. So we need to add that condition to applyIf of the two IR rules.

[1] https://github.com/openjdk/jdk/blob/master/src/hotspot/share/opto/memnode.cpp#L3455