Add signal set, add, and fetch to changes

Signed-off-by: James Dinan <[email protected]>

content/backmatter.tex

@@ -669,7 +669,8 @@ \section{Version 1.6}
 \label{changelog:v1.6}
 Major changes in \openshmem[1.6] include the addition of inclusive and
 exclusive scan operations, session routines, support for multiple
-initialization and finalization calls, interleaved block transfer APIs, and the
+initialization and finalization calls, interleaved block transfer APIs,
+signal add and set APIs, and the
 \FUNC{shmem\_team\_ptr} function.
 
 The following list describes the specific changes in \openshmem[1.6]:
@@ -874,6 +875,9 @@ \section{Version 1.5}
 \item Added support for nonblocking \OPR{put-with-signal} functions.
 \ChangelogRef{subsec:shmem_put_signal_nbi}%
 %
+\item Added \FUNC{shmem\_signal\_fetch} function.
+\ChangelogRef{subsec:shmem_signal_fetch}%
+%
 \item Deprecated point-to-point synchronization types and names.
 \ChangelogRef{p2psynctypes, dep:p2p_sync_types}%
 %