Fixes to 1992/ant

The Makefile has had a new rule added and another fixed as 'am' does not
support certain features that the Makefile uses.

Added #include <time.h> as the author stated that for some systems it
might be necessary (like DOS with Turbo C assuming anyone here uses
that).

Typo fixes including references to files that do not exist (am.c ->
ant.c and so on).

Typo/format check README.md and ant.README.

1992/ant/ant.test.mk

@@ -180,7 +180,7 @@ error.1:
 #  Target where dependency does not exist.
 error.2: unknown
 
-#  Receipe command causes error.
+#  Recipe command causes error.
 error.3: t1 fail t2
 fail:
 	ls -l unknown