Fixes errors

regcomp.c: In function 'parse_bracket_exp':
regcomp.c:2724: error: invalid storage class for function 'seek_collating_symbol_entry'
regcomp.c:2757: error: invalid storage class for function 'lookup_collation_sequence_value'
regcomp.c:2826: error: invalid storage class for function 'build_range_exp'
regcomp.c:2913: error: invalid storage class for function 'build_collating_symbol'
...
make[2]: *** [/home/dank/queue/jobdir.fast/crosstool-dev/build/x86_64-unknown-linux-gnu/gcc-4.0-20050305-glibc-2.3.3/build-glibc/posix/regex.o] Error 1

See also http://sources.redhat.com/ml/glibc-cvs/2004-q3/msg01071.html
That fix requires gcc-4.0, but the fix proposed here works with older compilers, too

--- glibc-2.3.3/posix/regcomp.c.old	2005-03-16 11:40:55.000000000 -0800
+++ glibc-2.3.3/posix/regcomp.c	2005-03-16 11:50:31.000000000 -0800
@@ -2718,8 +2718,14 @@
      Seek the collating symbol entry correspondings to NAME.
      Return the index of the symbol in the SYMB_TABLE.  */
 
+#if __GNUC__ >= 4
+  auto inline int32_t
+#else
   static inline int32_t
+#endif
+#if __GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 2)
   __attribute ((always_inline))
+#endif
   seek_collating_symbol_entry (name, name_len)
 	 const unsigned char *name;
 	 size_t name_len;
@@ -2751,8 +2757,14 @@
      Look up the collation sequence value of BR_ELEM.
      Return the value if succeeded, UINT_MAX otherwise.  */
 
+#if __GNUC__ >= 4
+  auto inline unsigned int
+#else
   static inline unsigned int
+#endif
+#if __GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 2)
   __attribute ((always_inline))
+#endif
   lookup_collation_sequence_value (br_elem)
 	 bracket_elem_t *br_elem;
     {
@@ -2819,8 +2831,14 @@
      mbcset->range_ends, is a pointer argument sinse we may
      update it.  */
 
-  static inline reg_errcode_t
+#if __GNUC__ >= 4
+  auto inline reg_errcode_t
+#else
+  static inline reg_errcode_t
+#endif
+#if __GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 2)
   __attribute ((always_inline))
+#endif
 # ifdef RE_ENABLE_I18N
   build_range_exp (sbcset, mbcset, range_alloc, start_elem, end_elem)
 	 re_charset_t *mbcset;
@@ -2906,8 +2924,14 @@
      COLL_SYM_ALLOC is the allocated size of mbcset->coll_sym, is a
      pointer argument sinse we may update it.  */
 
-  static inline reg_errcode_t
+#if __GNUC__ >= 4
+  auto inline reg_errcode_t
+#else
+  static inline reg_errcode_t
+#endif
+#if __GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 2)
   __attribute ((always_inline))
+#endif
 # ifdef RE_ENABLE_I18N
   build_collating_symbol (sbcset, mbcset, coll_sym_alloc, name)
 	 re_charset_t *mbcset;