[zorg][lldb-statistics] Pass historic build directory to LLDB_prepare

This is an attempt to fix following error:
```
+ chmod +x ****
+ **** sign lldb-build/bin/debugserver
chown: lldb-build/bin/debugserver: No such file or directory
```

zorg/jenkins/jobs/jobs/lldb-statistics

@@ -163,7 +163,7 @@ pipeline {
                 }
                 script {
                     def LLDB = new org.swift.LLDB()
-                    LLDB.LLDB_prepare()
+                    LLDB.LLDB_prepare("$HISTORIC_COMPILER-build/bin/debugserver")
                 }
             }
         }