Second try to obtain bootstrap.log from Appveyor

appveyor.yml

@@ -32,10 +32,13 @@ install:
   - git submodule init tools/build
   - git submodule update
   - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\smart_ptr
-  - bootstrap || appveyor PushArtifact bootstrap.log & color 00
+  - bootstrap
   - b2 headers
 
 build: off
 
 test_script:
   - b2 libs/smart_ptr/test toolset=msvc-9.0,msvc-10.0,msvc-11.0,msvc-14.0
+
+artifacts:
+  - path: bootstrap.log