Don't build time and uname

We already have these utilities in cmdutils.

Change-Id: I04e86ed0e6f6394d01e317c03ab27044962c61ef
diff --git a/BUILD.gn b/BUILD.gn
index f61ee82..80f6138 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -83,13 +83,13 @@
     ":tee",
     ":test",
     ":tftp",
-    ":time",
+    # ":time",
     ":touch",
     ":tr",
     ":true",
     ":tsort",
     ":tty",
-    ":uname",
+    # ":uname",
     ":unexpand",
     ":uniq",
     ":unlink",
@@ -208,13 +208,13 @@
 sbase_util("tee") {}
 sbase_util("test") {}
 sbase_util("tftp") {}
-sbase_util("time") {}
+# sbase_util("time") {}
 sbase_util("touch") {}
 sbase_util("tr") {}
 sbase_util("true") {}
 sbase_util("tsort") {}
 sbase_util("tty") {}
-sbase_util("uname") {}
+# sbase_util("uname") {}
 sbase_util("unexpand") {}
 sbase_util("uniq") {}
 sbase_util("unlink") {}