CPackDeb: Invoke "dpkg-shlibdeps --version" with C locale

The version message is localized and may not match when a non-english locale is in use.

Modules/CPackDeb.cmake

@@ -240,7 +240,7 @@ if(CPACK_DEBIAN_PACKAGE_SHLIBDEPS)
 
   # Check version of the dpkg-shlibdeps tool using CPackRPM method
   if(SHLIBDEPS_EXECUTABLE)
-    execute_process(COMMAND ${SHLIBDEPS_EXECUTABLE} --version
+    execute_process(COMMAND env LC_ALL=C ${SHLIBDEPS_EXECUTABLE} --version
       OUTPUT_VARIABLE _TMP_VERSION
       ERROR_QUIET
       OUTPUT_STRIP_TRAILING_WHITESPACE)