Add template for Altera Cyclone5

This adds a first template for the Altera cyclone5 board.
The build is not yet complete (failing on some gcc6 issue
in qtmultimedia-rtlfm-radio-plugin).

A few notes: CFLAGS/Tunings are set to -mfpu=softfp compared to the hardfp of
all the other target boards we have.

Change-Id: I9b179d9aef610ee5a67166df2dd79a52e2ac6c19
Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org>