Tizen:Common - setup qemu-accel-* packages as links

Tizen:Common - setup qemu-accel-* packages as links

qemu-accel package was added as a normal package,
but build is excluded from all archs/repos.

Then it's possible to define some linked packages named
qemu-accel-<arch> to pick the appropriate spec file.

Project config was also changed to define gcc_version in the rpm macros
(needed by qemu-accel-* spec files)

Change-Id: Id79991997982e296f82a8e49e813115ca23e09f6
Bug-Tizen: TC-1509
Signed-off-by: Stephane Desneux <stephane.desneux@open.eurogiciel.org>