BUG: Fix for #7118.

      Relative paths going outside the current source dir resulted in badly
      placed moc source files in the build dir (or out of the build dir).

Modules/FindQt4.cmake

@@ -1021,6 +1021,7 @@ IF (QT4_QMAKE_FOUND)
       FILE(RELATIVE_PATH rel ${CMAKE_CURRENT_SOURCE_DIR} ${infile})
     ENDIF(CMAKE_CURRENT_BINARY_DIR MATCHES "${_checkinfile}")
     SET(_outfile "${CMAKE_CURRENT_BINARY_DIR}/${rel}")
+    STRING(REPLACE ".." "__" _outfile ${_outfile})
     GET_FILENAME_COMPONENT(outpath ${_outfile} PATH)
     GET_FILENAME_COMPONENT(_outfile ${_outfile} NAME_WE)
     FILE(MAKE_DIRECTORY ${outpath})