Fixed libiberty to build on FreeBSD. A few more problems to go.

git-svn-id: file:///srv/svn/repos/haiku/buildtools/trunk@14978 a95241bf-73f2-0310-859d-f6bbb57e9c96

gcc/libiberty/strerror.c

@@ -14,6 +14,7 @@
    attributes.  So we hide the declaration in errno.h (if any) using a
    macro. */
 #define sys_errlist sys_errlist__
+#define sys_nerr sys_nerr__
 #endif
 
 #include <stdio.h>
@@ -21,6 +22,7 @@
 
 #ifdef HAVE_SYS_ERRLIST
 #undef sys_errlist
+#undef sys_nerr
 #endif
 
 /*  Routines imported from standard C runtime libraries. */

gcc/libiberty/strsignal.c

@@ -17,6 +17,7 @@
    ignore any declaration in the system header files, and always
    declare it ourselves.  With luck, this will always work.  */
 #define sys_siglist no_such_symbol
+#define sys_nsig no_such_symbol2
 
 #include <stdio.h>
 #include <signal.h>
@@ -35,7 +36,7 @@ extern char *memset ();
 /* Undefine the macro we used to hide the definition of sys_siglist
    found in the system header files.  */
 #undef sys_siglist
-
+#undef sys_nsig
 #ifndef NULL
 #  ifdef __STDC__
 #    define NULL (void *) 0