I deleted TempFile class and changed it to utl::TempFile class
-which in unotools/tempfile.hxx- in the followings: Storage,
StgTmpStrm, SwXMailMerge classes; and RenderAsEMF function.
I modified header in precompiled_sw.hxx.

Change-Id: I3dae5333dc42538e1b905f6a6bbc85534c591dc1
Reviewed-on: https://gerrit.libreoffice.org/4938Reviewed-by: Andras Timar <atimar@suse.com>
Tested-by: Andras Timar <atimar@suse.com>