Fix configure -cmake -no-pch

Since the CMake build of Qt needs a special flag (BUILD_WITH_PCH)
we need to detect -no-pch separately in the configure script.

Change-Id: If31e129ba532c00a7e0a7ee817dec6a6a0138ebf
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

configure

@@ -159,6 +159,10 @@ $i"
                 CMAKE_CMDLINE="$CMAKE_CMDLINE
 -DQT_FEATURE_${VAR}=OFF"
                 ;;
+            -no-pch|--no-pch)
+                "$CMAKE_CMDLINE
+-DBUILD_WITH_PCH=OFF"
+                ;;
             -no-*|--no-*)
                 VAR=`echo $i | sed -E 's/-?-no-(.*)/\1/'`
                 CMAKE_CMDLINE="$CMAKE_CMDLINE