treewide: Mass replace 'libtiff}/lib' to refer the 'out' output

pkgs/tools/graphics/netpbm/default.nix

···
     cp config.mk.in config.mk
     echo "STATICLIB_TOO = n" >> config.mk
     substituteInPlace "config.mk" \
-        --replace "TIFFLIB = NONE" "TIFFLIB = ${libtiff}/lib/libtiff.so" \
+        --replace "TIFFLIB = NONE" "TIFFLIB = ${libtiff.out}/lib/libtiff.so" \
         --replace "TIFFHDR_DIR =" "TIFFHDR_DIR = ${libtiff}/include"
   '';