Move implementations of quaternion functions into driver/runtime.

Move the implementation of all quaternion functions from rs_math.rsh
driver/runtime. The old implementation remains in place for older
versions, and the move occurs only for an UNRELEASED API level.
Added a new file driver/runtime/rs_quaternion.c to contain the
implementations.

Change-Id: I70ffcb29e64b4287e37e349488a59a9f485847e4
Signed-off-by: Verena Beckham <verena@codeplay.com>
4 files changed