Update filesystem

git-svn-id: https://subversion.ews.illinois.edu/svn/sp14-ece391/_projects/group14/trunk@16045 1cec0ab5-dbbe-4d55-bb2a-e14ca091d7d0
Clean up some warning messages related to types and clang and sometimes asm

git-svn-id: https://subversion.ews.illinois.edu/svn/sp14-ece391/_projects/group14/trunk@16080 1cec0ab5-dbbe-4d55-bb2a-e14ca091d7d0
Fix portability issue related to using GCC for linking that caused the filesystem image to appear too high in memory

git-svn-id: https://subversion.ews.illinois.edu/svn/sp14-ece391/_projects/group14/trunk@16081 1cec0ab5-dbbe-4d55-bb2a-e14ca091d7d0