Fix for config program.
Backport change for different handling of inline functions in newer host compilers.

--- extra/config/zconf.hash.c_shipped
+++ extra/config/zconf.hash.c_shipped
@@ -161,6 +161,9 @@
 #define kconf_id_strings ((const char *) &kconf_id_strings_contents)
 #ifdef __GNUC__
 __inline
+#ifdef __GNUC_STDC_INLINE__
+__attribute__ ((__gnu_inline__))
+#endif
 #endif
 struct kconf_id *
 kconf_id_lookup (register const char *str, register unsigned int len)