common: Rename log and gcc attribute macros (jnlib merge).
* common/logging.h: Rename JNLIB_LOG_* to GPGRT_LOG_*. * common/mischelp.h: Rename JNLIB_GCC_* to GPGRT_GCC_*.
JNLIB has no more meaning. Thus we switch to a GPGRT_ prefix in
anticipation that some code may eventually be moved to libgpg-error.
- Signed-off-by: Werner Koch <wk@gnupg.org>