Add new key-value pairs to CHANGELOG

Bug: aomedia:3447
Change-Id: I3214caa159e0bc72edf0df78ce656174474918ea

CHANGELOG

diff --git a/CHANGELOG b/CHANGELOG
index 194f1fd..f35903d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -7,13 +7,16 @@
     * New codec controls:
       * AV1E_SET_QUANTIZER_ONE_PASS: Set quantizer for each frame.
       * AV1E_ENABLE_RATE_GUIDE_DELTAQ: enable the rate distribution guided delta
-        quantization in all intra mode.
+        quantization in all intra mode. The "enable-rate-guide-deltaq" option is
+        added for this control.
       * AV1E_SET_RATE_DISTRIBUTION_INFO: set the input file for rate
-        distribution used in all intra mode.
+        distribution used in all intra mode. The "rate-distribution-info" option
+        is added for this control.
       * AV1E_GET_LUMA_CDEF_STRENGTH
       * AV1E_SET_BITRATE_ONE_PASS_CBR
     * AOM_SCALING_MODE is extended to include 2/3 and 1/3 scaling.
     * aom_tune_metric is extended to include AOM_TUNE_VMAF_SALIENCY_MAP.
+      The "tune" option is extended to include "vmaf_saliency_map".
     * SVC example encoder svc_encoder_rtc is able to use the rate control
       library.
     * Loopfilter level and CDEF filter level is supported by RTC rate control