Fix plataform info for qt

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/wxQT@77085 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Update pkg-config to Qt5* libs

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/wxQT@77086 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Migrate to qt5 (includes QtGui -> QtWidgets, toAscii -> toLatin, QApplication::GuiClient from QApplication() in main)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/wxQT@77087 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Use wxString::utf8_str() to avoid ambiguity as Qt5 now expect that encoding for QString::QString(const char * str)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/wxQT@77088 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Add QT_WIDGETS_LIB define to enable QWidget* support in QTest (needed by uiactionsim)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/wxQT@77089 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
add SAMPLES_CXXFLAGS option for -fPIC due Qt is built with -reduce-relocations

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/wxQT@77090 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775