move help text from include/usage.src.h to coreutils/*.c

Signed-off-by: Pere Orga <gotrunks@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

coreutils/cat.c

@@ -22,6 +22,15 @@
 //config:	  cat is used to concatenate files and print them to the standard
 //config:	  output. Enable this option if you wish to enable the 'cat' utility.
 
+//usage:#define cat_trivial_usage
+//usage:       "[FILE]..."
+//usage:#define cat_full_usage "\n\n"
+//usage:       "Concatenate FILEs and print them to stdout"
+//usage:
+//usage:#define cat_example_usage
+//usage:       "$ cat /proc/uptime\n"
+//usage:       "110716.72 17.67"
+
 #include "libbb.h"
 
 /* This is a NOFORK applet. Be very careful! */