build: don't try to `ls -lh` executables that don't exist
build: don't try to `ls -lh` executables that don't exist

Avoids `ls: cannot access build/debug/node_g: No such file or directory`.
Not an actual error but it confuses people.

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node