Revert "Remove temporary file."

This reverts commit 821c7769.

autotests/libs/testresource/Messages.sh

 #! /usr/bin/env bash
 $EXTRACTRC `find . -name \*.ui` >> rc.cpp || exit 11
 $XGETTEXT *.cpp -o $podir/akonadi_knut_resource.pot
-rm -f rc.cpp

src/Messages.sh

 #! /bin/sh
 $EXTRACTRC `find -name "*.ui"` >> rc.cpp
 $XGETTEXT `find -name "*.cpp" -o -name "*.h" | grep -v '/tests/' | grep -v '/autotests/'` -o $podir/libakonadi5.pot
-rm -f rc.cpp

[Luigi Toscano]

A revert message should explain why (I know the reason: it needs to be cleaned), but it's better to keep it for anyone else.

[Alexander Potashev]

Sorry I skipped it. I believe it's not recommend to rewrite Git history, so it will have to stay as is.