Create tool_helper library

src/Tools/build_all.bat

@@ -4,6 +4,7 @@ rem build_all [clean]
 set bin_projects=psxcdgen psxcdread
 set bin_linux_projects=cpp_out
 set clean_projects=cdtypes
+set clean_projects_linux=tool_helper
 
 set projects=%bin_projects%
 set linux_projects=%bin_linux_projects%
@@ -14,6 +15,7 @@ IF NOT "%~1" == "" (
     IF "%~1" == "clean" (
         set build_type=clean
         set projects=%projects% %clean_projects%
+        set linux_projects=%linux_projects% %clean_projects_linux%
     ) ELSE (
         set build_type=%~1
     )