Correct upstream's bld.bat

- the "if" from "if not exist" wasn't present, resulting in a script failure
- the files in the include\ directory weren't being moved because windows
  doesn't move recursively by default

recipe/bld.bat

@@ -1,9 +1,10 @@
 if not exist %PREFIX% mkdir %PREFIX%
 
 move lib\x64\* %LIBRARY_LIB%
-move include\* %LIBRARY_INC%
+if not exist %LIBRARY_INC%\CL mkdir %LIBRARY_INC%\CL
+move include\CL\* %LIBRARY_INC%\CL
 
- not exist %LIBRARY_PREFIX%\etc mkdir %LIBRARY_PREFIX%\etc
- not exist %LIBRARY_PREFIX%\etc\OpenCL mkdir %LIBRARY_PREFIX%\etc\OpenCL
- not exist %LIBRARY_PREFIX%\etc\OpenCL\vendors mkdir %LIBRARY_PREFIX%\etc\OpenCL\vendors
- type nul >> %LIBRARY_PREFIX%\etc\OpenCL\vendors\cuda.icd
+if not exist %LIBRARY_PREFIX%\etc mkdir %LIBRARY_PREFIX%\etc
+if not exist %LIBRARY_PREFIX%\etc\OpenCL mkdir %LIBRARY_PREFIX%\etc\OpenCL
+if not exist %LIBRARY_PREFIX%\etc\OpenCL\vendors mkdir %LIBRARY_PREFIX%\etc\OpenCL\vendors
+type nul >> %LIBRARY_PREFIX%\etc\OpenCL\vendors\cuda.icd