We need to all all=-N -l because some objects are being optimzied away

Without all=-N -l, some objects are being optimized away and
impossible to debug

hack/lib/golang.sh

@@ -809,7 +809,7 @@ kube::golang::build_binaries() {
     gogcflags="all=-trimpath=${trimroot} ${GOGCFLAGS:-}"
     if [[ "${DBG:-}" == 1 ]]; then
         # Debugging - disable optimizations and inlining and trimPath
-        gogcflags="${GOGCFLAGS:-} -N -l"
+        gogcflags="${GOGCFLAGS:-} all=-N -l"
         goasmflags=""
     fi