Update prepare_command output

Author: Sergey Erokhin

install_vendored_dynamic_framework/after/execution_output.txt

@@ -14,7 +14,7 @@ Fetching external sources
      $ GIT_BIN clone https://github.com/realm/realm-cocoa.git PROJECT/Pods/RealmSwift --template= --single-branch --depth 1 --branch v0.94.1
 
  > Running prepare command
-   $ BASH_BIN -c  set -e rm -rf RealmSwift mv RealmSwift-swift1.2 RealmSwift
+   $ BASH_BIN -c  set -e cd PROJECT/Pods/RealmSwift rm -rf RealmSwift mv RealmSwift-swift1.2 RealmSwift
 
 Resolving dependencies of `Podfile`