gcc: remove external sources patches

--- a/libstdc++-v3/acinclude.m4

+++ b/libstdc++-v3/acinclude.m4

@@ -125,6 +125,15 @@ AC_DEFUN([GLIBCXX_CONFIGURE], [

   ## other macros from doing the same.  This should be automated.)  -pme

   need_libmath=no

+  # Check for uClibc since Linux platforms use different configuration

+  # directories depending on the C library in use.

+  AC_EGREP_CPP([_using_uclibc], [

+  #include <stdio.h>

+  #if __UCLIBC__

+    _using_uclibc

+  #endif

+  ], uclibc=yes, uclibc=no)

+

   # Find platform-specific directories containing configuration info.

   # Also possibly modify flags used elsewhere, as needed by the platform.

   GLIBCXX_CHECK_HOST

--- a/libstdc++-v3/config/os/gnu-linux/ctype_base.h

+++ b/libstdc++-v3/config/os/gnu-linux/ctype_base.h

@@ -31,8 +31,6 @@

 //

 // ISO C++ 14882: 22.1  Locales

 //

-#include <features.h>

-#include <ctype.h>

 /** @file ctype_base.h

  *  This is an internal header file, included by other library headers.

@@ -47,11 +45,7 @@ _GLIBCXX_BEGIN_NAMESPACE(std)

   struct ctype_base

   {

     // Non-standard typedefs.

-#ifdef __UCLIBC__

-    typedef const __ctype_touplow_t*   __to_type;

-#else

-    typedef const int*         __to_type;

-#endif

+    typedef const int*		__to_type;

     // NB: Offsets into ctype<char>::_M_table force a particular size

     // on the mask type. Because of this, we don't use an enum.