Subzero. Removes X8664_STACK_HACK from the crosstests.

crosstest/mem_intrin_main.cpp

 /* crosstest.py --test=mem_intrin.cpp --driver=mem_intrin_main.cpp \
    --prefix=Subzero_ --output=mem_intrin */
 
 #include <stdint.h> /* cstdint requires -std=c++0x or higher */
 #include <cstdio>
 
 #include "mem_intrin.h"
 #include "xdefs.h"
 
 namespace Subzero_ {
@@ skipping 45 matching lines @@
 
 #define X(NBYTES)                                                              \
   do_test_fixed(memcpy_test_fixed_len, NBYTES);                                \
   do_test_fixed(memmove_test_fixed_len, NBYTES);                               \
   do_test_fixed(memset_test_fixed_len, NBYTES);
   MEMINTRIN_SIZE_TABLE
 #undef X
 #undef do_test_fixed
 }
 
-#ifdef X8664_STACK_HACK
-extern "C" int wrapped_main(int argc, char *argv[]) {
-#else  // !defined(X8664_STACK_HACK)
 int main(int argc, char *argv[]) {
-#endif // X8664_STACK_HACK
   unsigned TotalTests = 0;
   unsigned Passes = 0;
   unsigned Failures = 0;
   testFixedLen(TotalTests, Passes, Failures);
   testVariableLen(TotalTests, Passes, Failures);
   printf("TotalTests=%u Passes=%u Failures=%u\n", TotalTests, Passes, Failures);
   return Failures;
 }