solved build dependency puzzle in regex.c:

* removed superfluous #include <config.h> which was protected by an #ifdef
  that evaluated to false - so the file never got included, but jam tried
  to locate it and usually failed, unless there happens to be a config.h
  in the current working directory. 
  This fixes a spurious dependency from regex.c to the config.h in 
  src/libs/iconv.h if you invoked jam from there.
* fixed two warnings by always including stdlib.h

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28639 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/libroot/posix/glibc/regex/regex.c

@@ -27,10 +27,6 @@
 #undef	_GNU_SOURCE
 #define _GNU_SOURCE
 
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
 #ifndef PARAMS
 # if defined __GNUC__ || (defined __STDC__ && __STDC__)
 #  define PARAMS(args) args
@@ -143,12 +139,7 @@
    even if config.h says that we can.  */
 # undef REL_ALLOC
 
-# if defined STDC_HEADERS || defined _LIBC
+#include <stdlib.h>
-#  include <stdlib.h>
-# else
-char *malloc ();
-char *realloc ();
-# endif
 
 /* When used in Emacs's lib-src, we need to get bzero and bcopy somehow.
    If nothing else has been done, use the method below.  */