framework: expose devel/llvm17 in USES=llvm after 6e04d1ad5871

$ sed -i '' 's/min=16/min=17/' x11-wm/hyprland/Makefile
$ make clean all -C x11-wm/hyprland
[...]
CMake Error at /usr/local/share/cmake/Modules/CMakeDetermineCCompiler.cmake:49 (message):

Could not find compiler set in environment variable CC:

/usr/local/llvm/bin/clang.

Call Stack (most recent call first):

CMakeLists.txt