[PATCH] Move clcmacro.h to avoid cluttering user namespace v2

v2: - use quotes instead of <>
   - add include to r600/lib/math/nextafter.c

v2: - use quotes instead of <>
   - add include to r600/lib/math/nextafter.c

LGTM.

Reviewed-by: Aaron Watry <awatry@gmail.com>

Committed. Thanks for your reviews Aaron and Tom.

Jeroen