[RFC]androiddump: Only filter CR/LFs on Windows

Comments in code claim:
"The data we are getting from the tcpdump stdoutput stream as the
 stdout is the text stream it is convertinng the 0A=0D0A; So we
 need to remove these extra character."

This is not true on non-Windows systems at least so avoid the filter
when not built for Windows.

NOTE: A problem with the filter is that it operates on all bytes
received on the socket, including packet data(!). Capturing
data with CR/LFs (for example an HTTP request) will fail. Ideally
the filter should be replaced with some other mechanism but as I
don't have a Windows system to verify that the comment claims are
valid, this change will at least make androiddump work on
non-Windows systems.

Bug: 13510
Change-Id: Ic00f44fa7516c0db7fc015ed8685deb365a347db
Reviewed-on: https://code.wireshark.org/review/22397
Petri-Dish: Roland Knall <rknall@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Roland Knall <rknall@gmail.com>

extcap/androiddump.c

@@ -2579,9 +2579,11 @@ static int capture_android_wifi_tcpdump(char *interface, char *fifo,
         gssize i = 0,read_offset,j=0;
        /*Filter the received data to get rid of unwanted 0DOA*/
         for (i = 0; i < (used_buffer_length - 1); i++) {
+#ifdef _WIN32
             if (data[i] == 0x0d && data[i + 1] == 0x0a) {
                 i++;
             }
+#endif
             filter_buffer[filter_buffer_length++] = data[i];
         }