Only enable profiling in `ld` if PROFILE is set
Only enable profiling in `ld` if PROFILE is set

This way, Clang builds without PROFILE won't generate `default.profraw`.
See termux/termux-packages#1672.

der-lyse/newsboat,der-lyse/newsboat,newsboat/newsboat,der-lyse/newsboat,newsboat/newsboat,der-lyse/newsboat,der-lyse/newsboat,newsboat/newsboat,newsboat/newsboat,newsboat/newsboat,der-lyse/newsboat,der-lyse/newsboat,newsboat/newsboat,newsboat/newsboat,der-lyse/newsboat,newsboat/newsboat