qt5connectivity: fix for big endian platforms

qt5connectivity: fix for big endian platforms

Add a patch to fix qt5connectivity for big endian platforms.

Building qtconnectivity fails for big endian platforms because the
bswap_16 function is not declared. This is the error message:

In file included from bluez/hcimanager_p.h:52:0,
		 from bluez/hcimanager.cpp:35:
./bluez/bluez_data_p.h: In function 'quint16 bt_get_le16(const void*)':
./bluez/bluez_data_p.h:172:60: error: 'bswap_16' was not declared in
this scope
     return bswap_16(bt_get_unaligned((const quint16 *) ptr));

bswap_16 is defined in byteswap.h so we can include this file in order
to fix this problem.

This patch has been submitted upstream:

  https://bugreports.qt.io/browse/QTBUG-44421

Fixes:

  http://autobuild.buildroot.net/results/5b8/5b85c6819f94988abd8abfcdaad6226ceb2d790a/

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>