Add mkspec for the STMicroelectronic's ST7540 platform to be used in
conjunction with the -device support in configure. This allows you
to build Qt with the application libraries provided by STM SDK 36.
Change-Id: I4369b23b9a0c9063417e5cc71969f65e967e4019
Reviewed-by: Girish Ramakrishnan <girish.1.ramakrishnan@nokia.com>
