Update versions to 0.5.23.

From-SVN: r20509

libf2c/libF77/Version.c

@@ -3,7 +3,7 @@ static char junk[] = "\n@(#)LIBF77 VERSION 19970919\n";
 /*
 */
 
-char __G77_LIBF77_VERSION__[] = "0.5.23-19980503";
+char __G77_LIBF77_VERSION__[] = "0.5.23";
 
 /*
 2.00	11 June 1980.  File version.c added to library.

libf2c/libI77/Version.c

@@ -3,7 +3,7 @@ static char junk[] = "\n@(#) LIBI77 VERSION pjw,dmg-mods 19980405\n";
 /*
 */
 
-char __G77_LIBI77_VERSION__[] = "0.5.23-19980503";
+char __G77_LIBI77_VERSION__[] = "0.5.23";
 
 /*
 2.01	$ format added

libf2c/libU77/Version.c

 static char junk[] = "\n@(#) LIBU77 VERSION 19970919\n";
 
-char __G77_LIBU77_VERSION__[] = "0.5.23-19980501";
+char __G77_LIBU77_VERSION__[] = "0.5.23";
 
 #include <stdio.h>