Fix compilation of tst_compilation (:-P) benchmark.

Change-Id: I7bbf24d816a356f100d7e2c5a8e7a81218f0f54d
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
benchmarks/particles: fix projects to actually build

Change-Id: I3edb05279119b921b50a0329dfd47f0ff2cdb9bc
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
benchmarks: Skip compilation of (and mark with FIXME) a few benchmarks that don't build.

Change-Id: I4d2e9bf3a520636c568a6b58e311994693446c97
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>