Merge pull request #891 from xavierzwirtz/clean-cache-mdb

Removes mono debug file after cache is saved.

Author: forki

src/app/FakeLib/FSIHelper.fs

@@ -341,6 +341,8 @@ let internal runFAKEScriptWithFsiArgsAndRedirectMessages printDetails (FsiArgs(f
 
                         if File.Exists("FSI-ASSEMBLY.pdb") then
                             File.Delete("FSI-ASSEMBLY.pdb")
+                        if File.Exists("FSI-ASSEMBLY.dll.mdb") then
+                            File.Delete("FSI-ASSEMBLY.dll.mdb")
 
                         let dynamicAssemblies = 
                             System.AppDomain.CurrentDomain.GetAssemblies()