Version 2.6.0-dev.8.1

* Cherry-pick dee702264b4ab6f6b634b2e346de5ac7ea08b042 to dev
* Cherry-pick 9f1b0fe102c0ad4599b695974621530f07684290 to dev
* Cherry-pick 30719b37a9397cc38610e71a804236ec314535ec to dev
* Cherry-pick d2b39d1a07a18572bdafedb79ce68ef5bf9e64bf to dev
* Cherry-pick c19adc635542004d2c2cdac55b447e7175391bf8 to dev
* Cherry-pick 8d8faa7dea152cce83681bad4467dac87a30f7de to dev
* Cherry-pick a9fc9f7fd4bbd9c211fbe2b1329dce82e0c1d0a2 to dev
diff --git a/tools/VERSION b/tools/VERSION
index 528e6b2..3393977 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -34,6 +34,6 @@
 MINOR 6
 PATCH 0
 PRERELEASE 8
-PRERELEASE_PATCH 0
+PRERELEASE_PATCH 1
 ABI_VERSION 19
 OLDEST_SUPPORTED_ABI_VERSION 18