combine changes and last_changes step into one

Author: vkuznet

Diff for: .github/workflows/build.yml

@@ -58,7 +58,8 @@ jobs:
 
         echo "Build full set of tools"
         make release
-        make last_changes
+        echo "Generate CHANGES.md and LAST_CHANGES.md"
+        make changes
 
     - name: Create Release
       id: create_release

Diff for: Makefile

@@ -88,8 +88,6 @@ tarball:
 
 changes:
 	./gen_release_log.sh
-
-last_changes:
 	./extract_last_changes.sh
 
 release: clean build_amd64 build_arm64 build_windows build_power8 build_darwin tarball changes