acpitable: open the data file in binary mode

-acpitable {file|data}=file reads the content of file, but it is
in binary form, so the file should be opened usin O_BINARY flag.
On *nix it is a no-op, but on windows and other weird platform
it is really needed.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

hw/acpi.c

@@ -104,7 +104,7 @@ int acpi_table_add(const char *t)
     /* now read in the data files, reallocating buffer as needed */
 
     for (f = strtok(buf, ":"); f; f = strtok(NULL, ":")) {
-        int fd = open(f, O_RDONLY);
+        int fd = open(f, O_RDONLY | O_BINARY);
 
         if (fd < 0) {
             fprintf(stderr, "can't open file %s: %s\n", f, strerror(errno));