profiles: @System: force >=findutils-4.4

Some packages/eclasses started adding a DEPEND on recent findutils as
they wanted to use newer POSIX syntax ("-exec +").  Since this usage
is throughout the tree and most don't bother depending on it, force
the @System to pull in a recent version.

profiles/base/packages

@@ -39,7 +39,9 @@
 #*sys-apps/debianutils
 *sys-apps/diffutils
 *sys-apps/file
-*sys-apps/findutils
+# Much of the tree relies on newer features like "-exec +".
+# Force a recent stable version so people stay up-to-date.
+*>=sys-apps/findutils-4.4
 *sys-apps/gawk
 *sys-apps/grep
 *sys-apps/kbd