Requires pkgconfig(sensor) instead of libsensord-devel

Requires pkgconfig(sensor) instead of libsensord-devel

To remove profile build dependencies from sensord, sensord's package set is being restructured.
In the new sensord package set, libsensord-devel does not exist anymore.
Temporarily, a dummy package libsensord-devel, which just requires sensord-devel,
will be added to the snapshot, but it will be removed soon.

Naturally, from any packages, libsensord-devel should not be directly required.
Requiring pkgconfig(sensor) will work without issues instead.

Change-Id: Icd366697554927159964851e465f1008639de6c2
Signed-off-by: Mu-Woong Lee <muwoong.lee@samsung.com>