Use correct preprocessor define (__arm__ vs __ARM__) to detect compilation for ARM architecture CPUs.

Allocate 512MB of address-space instead of 1GB for memory objects on 32-bit. This allows the test scripts to have more than one around at a time without exhausting 2GB of user address-space.

Fix crash when deleting a partially initialized MemoryInstance after its address-space allocation fails

Explicitly trap on (INT_MIN / -1) to ensure LLVM DCE or constant folding doesn't eliminate the trap.

WASM globals are disparate from WASM linear memory. Similar to how we reset linear memory after each invocation, we need to reset globals as well.

Linear memory is optional in WASM. Protect against crashes when a WASM doesn't use it.

Previously, the WASM "start" function would be called once right after compilation. This was problematic for two reasons. 1) It was called during a period of time not expected (not during any context), and 2) if the user was expecting the start function to be called for initialization it would not be called after the memory had been reset on subsequent apply() calls -- that could be a surprise.

Now call the WASM "start" function before each init() and apply().

* Fix DEFINE_INTRINSIC_FUNCTION7 macro

Adding float opcodes that were removed from the non-float opcode macro, but missed being added to the float opcode macro