pin fake in build.sh

Author: davidoptima

build.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 if [ ! -f packages/FAKE/tools/FAKE.exe ]; then
-  mono .nuget/NuGet.exe install FAKE -OutputDirectory packages -ExcludeVersion
+  mono .nuget/NuGet.exe install FAKE -OutputDirectory packages -ExcludeVersion -Version 4.1.2 
 fi
 #workaround assembly resolution issues in build.fsx
 mono packages/FAKE/tools/FAKE.exe build.fsx $@