miasm2 modification for compiling with mingw32 on Windows

JitCore.c

// Remove the weak linkage
PyObject* /*__attribute__((weak))*/ vm_get_mem(JitCpu *self, PyObject* args)

vm_mngr.h

#define __BIG_ENDIAN 4321
#define __LITTLE_ENDIAN 1234
#define __BYTE_ORDER __LITTLE_ENDIAN

vm_mngr_py.h

#define	SIGALRM	14