Add tools-profile feature support

With this patch, the build system supports the tools-profile feature,
We can add it into the EXTRA_IMAGE_FEATURES in conf/local.conf,
to add more debug/profile tools into the image

Change-Id: Ic3c3811d9bca3f99a9e94d7c9da5a71ce1321d02
Signed-off-by: Yong Li <yong.b.li@linux.intel.com>