darwin: fix typos in install scripts

fixes some issues in my commits in:

- basic_cmds
- network_cmds

(cherry picked from commit f283145308)

pkgs/os-specific/darwin/apple-source-releases/basic_cmds/default.nix

@@ -15,7 +15,7 @@ appleDerivation rec {
   installPhase = ''
     for f in Products/Release/*; do
       if [ -f $f ]; then
-        install -D $file $out/usr/bin/$(basename $f)
+        install -D $f $out/usr/bin/$(basename $f)
       fi
     done
 

pkgs/os-specific/darwin/apple-source-releases/network_cmds/default.nix

@@ -23,7 +23,7 @@ appleDerivation rec {
     for f in Products/Release/*; do
       if [ -f $f ]; then
         install -D $file $out/bin/$(basename $f)
-      done
+      fi
     done
 
     for n in 1 5; do