selftests: ftrace: add more config fragments

We need to enable more configs to make test more
without this patch,we got lots of "UNSUPPORTED"

before the patch:
http://pastebin.ubuntu.com/25784377/
after the patch:
http://pastebin.ubuntu.com/25784387/



Signed-off-by: Lei Yang <Lei.Yang@windriver.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>