build: debug AppVeyor paths

Author: dougwilson

appveyor.yml

@@ -23,7 +23,10 @@ before_test:
   - SET PATH=%MYSQL_PATH%\bin;%PATH%
   - echo %MYSQL_PATH%
   - echo %PATH%
-  - DIR %MYSQL_PATH%\bin
+  - DIR "C:\Program Files"
+  - DIR "C:\Program Files (x86)"
+  - DIR "%MYSQL_PATH%"
+  - DIR "%MYSQL_PATH%\bin"
   - mysqladmin --host=%MYSQL_HOST% --user=%MYSQL_USER% --password=%MYSQL_PASSWORD% create %MYSQL_DATABASE%
 
 test_script: