[depends] Qt fails to build on OSX 10.11, Xcode 7.3.1 #7999

In file included from qcocoacursor.mm:35:
./qcocoawindow.h:223:11: warning: 'devicePixelRatio' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
    qreal devicePixelRatio() const;
          ^
../../../../include/QtGui/5.5.0/QtGui/qpa/../../../../../src/gui/kernel/qplatformwindow.h:110:19: note: overridden virtual function is here
    virtual qreal devicePixelRatio() const;
                  ^
qcocoacursor.mm:76:20: error: no matching function for call to 'CGEventCreateMouseEvent'
    CGEventRef e = CGEventCreateMouseEvent(0, kCGEventMouseMoved, pos, 0);
                   ^~~~~~~~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/CoreGraphics.framework/Headers/CGEvent.h:57:33: note: 
      candidate function not viable: no known conversion from 'int' to 'CGMouseButton' for 4th argument
CG_EXTERN CGEventRef __nullable CGEventCreateMouseEvent(
                                ^
26 warnings and 1 error generated.
make[4]: *** [.obj/qcocoacursor.o] Error 1

This seems to be fixed in Qt 5.5.1, but probably isn't worth an intermediate bump to 5.5.1 if we're going to shift to 5.6 soon?

Hmm, lots to bump. I was planning on doing a clang bump for the cross build, with an SDK bump to match. That would introduce this problem I suppose, so we'll need to fix this one first.

Just going straight to 5.6.0 probably makes the most sense.

Yes. Lets just go to 5.6.0. 5.6.0 also would give us (better) HiDPI support for Win/Linux.

Fixed since we've upgraded to QT 5.6.1