Revert "Build system: CxxCodeTemplateRenderer: only update destination file when changed"
Revert "Build system: CxxCodeTemplateRenderer: only update destination file when changed"

This reverts commit 239293697df6631e67d6cd9839293ae2b656f68a.

Turns out writing the file is necessary. It updates the file's timestamp so that
the build system won't try to rebuild it next time.

phusion/passenger,phusion/passenger,phusion/passenger,phusion/passenger,phusion/passenger,phusion/passenger,phusion/passenger,phusion/passenger