buildroot

setools: fix build on SPARC64

To build shared libraries on SPARC64, -fPIC must be used instead of
just -fpic. This commit fixes the setools package, which allows to get
rid of the following autobuilder failure:

  http://autobuild.buildroot.net/results/ba1e473178bb66ebc43897b20e534606d2577ee3/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>