Additional changes relating to bug tracker issue #3224. After further investigation, it became apparent that the timestamp based checks for the DLL could run into issues: when the DLL or SO file is extracted from the PK4, the new file in the game directory has a file modification timestamp based on the date and time that it was extracted and not the date/time of the file in the pk4. This code change sets the correct file timestamp for the extracted file.

git-svn-id: http://svn.thedarkmod.com/svn/darkmod_src/trunk@5918 49c82d7f-2e2a-0410-a16f-ae8f201b507f