0023095: Porting demo and samples on OCCT 6.5.3

Fix for paths in *.vcproj files in MFC sample
Fixed scripts for QT samples on Linux platform

samples/qt/Tutorial/custom.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+#Define CASROOT and QTDIR variables in order to generate Makefile files by qmake
+
+export CASROOT=""
+
+export QTDIR=""
+
+if test "${CASROOT}" == ""; then
+   echo "Environment variable \"CASROOT\" not defined."
+   exit 1
+fi
+
+if test "${QTDIR}" == ""; then
+   echo "Environment variable \"QTDIR\" not defined."
+   exit 1
+fi
+
+export PATH=${QTDIR}/bin:${PATH}