Hush compiler for extern inline warnings by using

__extern_inline macro, this also makes gcc 4.3 happy.
(Taken from NPTL branch)

Signed-off-by: Khem Raj <raj.khem@gmail.com>

include/ctype.h

@@ -239,13 +239,13 @@ __exctype (_tolower);
 # endif
 
 # ifdef __USE_EXTERN_INLINES
-extern __inline int
+__extern_inline int
 __NTH (tolower (int __c))
 {
   return __UCLIBC_CTYPE_IN_TO_DOMAIN(__c) ? (__UCLIBC_CTYPE_TOLOWER)[__c] : __c;
 }
 
-extern __inline int
+__extern_inline int
 __NTH (toupper (int __c))
 {
   return __UCLIBC_CTYPE_IN_TO_DOMAIN(__c) ? (__UCLIBC_CTYPE_TOUPPER)[__c] : __c;

libc/sysdeps/linux/common/bits/cmathcalls.h

@@ -135,21 +135,21 @@ __MATHDECL (_Mdouble_,creal, (_Mdouble_complex_ __z));
 #if defined __GNUC__ && !__GNUC_PREREQ (2, 97) && defined __OPTIMIZE__
 
 /* Imaginary part of Z.  */
-extern __inline _Mdouble_
+__extern_inline _Mdouble_
 __MATH_PRECNAME(cimag) (_Mdouble_complex_ __z) __THROW
 {
   return __imag__ __z;
 }
 
 /* Real part of Z.  */
-extern __inline _Mdouble_
+__extern_inline _Mdouble_
 __MATH_PRECNAME(creal) (_Mdouble_complex_ __z) __THROW
 {
   return __real__ __z;
 }
 
 /* Complex conjugate of Z.  */
-extern __inline _Mdouble_complex_
+__extern_inline _Mdouble_complex_
 __MATH_PRECNAME(conj) (_Mdouble_complex_ __z) __THROW
 {
   return __extension__ ~__z;