Add the Windows COFF format support for AOT (#382)

Add the Windows COFF format support to wamr-compiler and iwasm can
load and excute it on Windows(X64) platform.

Signed-off-by: Wu Zhongmin <vwzm@live.com>
Signed-off-by: Xiaokang Qin <xiaokang.qxk@antgroup.com>

Co-authored-by: Wu Zhongmin <vwzm@live.com>

core/shared/platform/windows/win_memmap.c

@@ -19,6 +19,9 @@ void * os_mmap(void *hint, size_t size, int prot, int flags)
         /* integer overflow */
         return NULL;
 
+    if (request_size == 0)
+        request_size = page_size;
+
     if (prot & MMAP_PROT_EXEC) {
         if (prot & MMAP_PROT_WRITE)
             flProtect = PAGE_EXECUTE_READWRITE;