# go somewhere you have write access to
cd

# find out where apache.vim is
locate apache.vim

# of course, the path on your system to apache.vim may be different.
# substitute accordingly
cp /usr/share/vim/vim63/syntax/apache.vim .

# apply the patch
patch < apache.vim.diff

# and iff all went well.....
sudo cp apache.vim /usr/share/vim/vim63/syntax