Add gps support

	hybris/include : Add gps support header
	hybris/tests :  Add gps test program

Signed-off-by: Philippe De Swert <philippe.deswert@jollamobile.com>
Random build warning fixes (implicit declarations etc)

	Fix a number of gcc warnings during build.

Signed-off-by: Philippe De Swert <philippe.deswert@jollamobile.com>
avoid some possible segfaults

	Improve gps test program with some more checks so it crashes
	less when there are issues with the binary blobs.

Signed-off-by: Philippe De Swert <philippe.deswert@jollamobile.com>