Provide LCB_LOG_ERR define
Provide LCB_LOG_ERR define

This is useful for LOG* macros which accept a level base as a parameter.
Unfortunately 'ERROR' is a reserved word on Win32, thus messing up the
macro concatenation.

Change-Id: I958cf86def412bfd4588867d4e48469663be542d
Reviewed-on: http://review.couchbase.org/31818
Reviewed-by: Mark Nunberg <e7d42768707bf23038325b0b68d4b577e5f6064a@haskalah.org>
Tested-by: Mark Nunberg <e7d42768707bf23038325b0b68d4b577e5f6064a@haskalah.org>

senthilkumaranb/libcouchbase,mnunberg/libcouchbase,avsej/libcouchbase,mnunberg/libcouchbase,signmotion/libcouchbase,PureSwift/libcouchbase,avsej/libcouchbase,uvenum/libcouchbase,couchbase/libcouchbase,uvenum/libcouchbase,maxim-ky/libcouchbase,avsej/libcouchbase,maxim-ky/libcouchbase,kojiromike/libcouchbase,senthilkumaranb/libcouchbase,couchbase/libcouchbase,signmotion/libcouchbase,couchbase/libcouchbase,mnunberg/libcouchbase,avsej/libcouchbase,kojiromike/libcouchbase,signmotion/libcouchbase,maxim-ky/libcouchbase,couchbase/libcouchbase,mnunberg/libcouchbase,senthilkumaranb/libcouchbase,couchbase/libcouchbase,kojiromike/libcouchbase,avsej/libcouchbase,mody/libcouchbase,mody/libcouchbase,mody/libcouchbase,uvenum/libcouchbase,uvenum/libcouchbase,kojiromike/libcouchbase,uvenum/libcouchbase,PureSwift/libcouchbase,signmotion/libcouchbase,maxim-ky/libcouchbase,PureSwift/libcouchbase,avsej/libcouchbase,PureSwift/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,mnunberg/libcouchbase,senthilkumaranb/libcouchbase,couchbase/libcouchbase,mody/libcouchbase