Add changes file for Qt 5.12.1

+ d1cf8dad0e Bump version
+ 4821972696 qbluetoothlocaldevice_p.cpp: Make sure d_ptr is initialized
+ 29d0ef9692 winrt: Document necessity of pairing devices before discovery
+ d55434e4e3 winrt: Clarify situation of ServiceClassIds and ProtocolDescriptorList
+ f61b280314 winrt: Small code cleanup
+ 60863d840e Android: Emit deviceDiscovered before deviceUpdated
+ a88d0ea41e Fix compilation with gcc 4.8
+ 0a4366a16d QQmlNdefRecord: port to QRegularExpression
+ 65bea2ce74 Prepare tst_qnearfieldmanager for configurations with builtin_testdata
+ b3b387698e qnearfieldmanager_emulator: Use Q_GLOBAL_STATIC for tag activator
+ 9c7085322f Prepare tst_qnearfieldtagtype2 for configurations with builtin_testdata
+ 4af2d432a0 Prepare tst_qnearfieldtagtype1 for configurations with builtin_testdata
+ 11c2589a51 Bump version
+ 4a6999d8f8 Fix use of the wrong constant: m_maximum should be INT_MAX
+ 9f5c8e5253 GCD timer - refactor and fix warnings
+ 04084404ba Add binary compatibility files for Qt 5.12 for QtConnectivity
+ db0f1f7ab0 Fix broken timeout handling in osxbtcentral manager
+ e9967647ff CoreBluetooth - fix warnings ('-Wobjc-interface-ivars')
+ fb03b1e921 Add missing dbus registrations and change documentation
+ 99b308ab54 Bump version

Change-Id: Id0ab97122b779130383b6ef05076c437c1cbf28a
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

dist/changes-5.12.1

@@ -0,0 +1,56 @@
+Qt 5.12.1 is a bug-fix release. It maintains both forward and backward
+compatibility (source and binary) with Qt 5.12.0.
+
+For more details, refer to the online documentation included in this
+distribution. The documentation is also available online:
+
+http://doc.qt.io/qt-5/index.html
+
+The Qt version 5.12 series is binary compatible with the 5.11.x series.
+Applications compiled for 5.11 will continue to run with 5.12.
+
+Some of the changes listed in this file include issue tracking numbers
+corresponding to tasks in the Qt Bug Tracker:
+
+https://bugreports.qt.io/
+
+Each of these identifiers can be entered in the bug tracker to obtain more
+information about a particular change.
+
+****************************************************************************
+*                              Qt 5.12.1 Changes                           *
+****************************************************************************
+
+QtBluetooth
+-----------
+
+ - Added various documentation clarifications.
+ - Fixed issue when compiling qbluetoothsocket.h header via gcc 4.8
+
+****************************************************************************
+*                      Platform Specific Changes                           *
+****************************************************************************
+
+Android
+-------
+
+ - [QTBUG-46008] Fixed wrong order emitting
+   QBluetoothDeviceDiscoveryAgent::deviceUpdated() & deviceDiscovered() signals.
+
+iOS/macOS
+---------
+
+ - [QTBUG-72487] Addressed inability to run several LE service detail discoveries
+   concurrently.
+
+Linux/BlueZ
+-----------
+
+ - [QTBUG-72742] Added missing dbus registration for an unexpected way of
+   using QBluetoothSocket.
+
+WinRT/UWP
+---------
+
+ - [QTBUG-67090] Fixed WinRT port not working with heartrate-game example.
+ - Added several fixes to unit tests enabling them to be run by Qt CI on WinRT.