osd: silence warning from -Wint-in-bool-context

osd: silence warning from -Wint-in-bool-context

The following warning appears during build:
ceph/src/osd/PGLog.h: In member function ‘void PGLog::IndexedLog::index(pg_log_dup_t&)’:
ceph/src/osd/PGLog.h:29:43: warning: ‘<<’ in boolean context, did you mean ‘<’ ? [-Wint-in-bool-context]
 #define PGLOG_INDEXED_DUPS             (1 << 3)
                                        ~~~^~~~~
ceph/src/osd/PGLog.h:29:43: note: in definition of macro ‘PGLOG_INDEXED_DUPS’
 #define PGLOG_INDEXED_DUPS             (1 << 3)
                                           ^~
ceph/src/osd/PGLog.h: In member function ‘void PGLog::IndexedLog::unindex(const pg_log_dup_t&)’:
ceph/src/osd/PGLog.h:29:43: warning: ‘<<’ in boolean context, did you mean ‘<’ ? [-Wint-in-bool-context]
 #define PGLOG_INDEXED_DUPS             (1 << 3)
                                        ~~~^~~~~
ceph/src/osd/PGLog.h:29:43: note: in definition of macro ‘PGLOG_INDEXED_DUPS’
 #define PGLOG_INDEXED_DUPS             (1 << 3)
                                           ^~
Signed-off-by: Jos Collin <jcollin@redhat.com>