Revert "Updating BuildTools from 2.1.0-rc1-15773 to 2.1.0-rc1-15774"

This reverts commit 983eb37cd61bee4f97f9bc44914575a9cad150b2.

korebuild-lock.txt

@@ -1,2 +1,2 @@
-version:2.1.0-rc1-15774
-commithash:ed5ca9de3c652347dbb0158a9a65eff3471d2114
+version:2.1.0-rc1-15773
+commithash:278888c83096a013848809db3cd79c8ddc27d176