Patches to commands for issues reported from static analysis tool.

portability.h.patch - it is for O_CLOEXEC, as compiler complained of it.
Makefile.patch - for cleaning generated/*.o files and libopts.dat file

[Fixup to uniq.c from Rob.]
diff --git a/lib/portability.h b/lib/portability.h
index b5fc0ac..07cb276 100644
--- a/lib/portability.h
+++ b/lib/portability.h
@@ -170,6 +170,10 @@
 #define O_NOFOLLOW 0
 #endif
 
+#ifndef O_CLOEXEC
+#define O_CLOEXEC 02000000
+#endif
+
 #if defined(__SIZEOF_DOUBLE__) && defined(__SIZEOF_LONG__) \
     && __SIZEOF_DOUBLE__ <= __SIZEOF_LONG__
 typedef double FLOAT;