stdcxx: re-enable _GLIBCXX_USE_C99_STDINT_TR1

The option was enabled until version 4.8 and is needed by
std::lock_guard at least.

repos/libports/include/stdcxx/bits/c++config.h

@@ -1261,7 +1261,7 @@ namespace std
 
 /* Define if C99 types in <stdint.h> should be imported in <tr1/cstdint> in
    namespace std::tr1. */
-/* #undef GLIBCXX_USE_C99_STDINT_TR1 */
+#define _GLIBCXX_USE_C99_STDINT_TR1 1
 
 /* Defined if clock_gettime has monotonic clock support. */
 /* #undef _GLIBCXX_USE_CLOCK_MONOTONIC */

repos/libports/ports/stdcxx.hash

@@ -1 +1 @@
-b39cfa69b3aa8f3a5f2d27b4249fbf15d402e1e4
+e718998ad84312ca17d023013fc1e1e981c144be

repos/libports/ports/stdcxx.port

@@ -10,6 +10,9 @@ KEY(gcc) := GNU
 
 TAR_OPT(gcc) := gcc-$(VERSION)/libstdc++-v3 --strip-components=2
 
+PATCHES   := src/lib/stdcxx/type_traits.patch
+PATCH_OPT := -p1 -d src/lib/stdcxx
+
 DIRS := include/stdcxx
 DIR_CONTENT(include/stdcxx) := \
     src/lib/stdcxx/include/* \

repos/libports/src/lib/stdcxx/type_traits.patch

@@ -0,0 +1,20 @@
+
+--- a/include/std/type_traits
++++ b/include/std/type_traits
+@@ -38,15 +38,7 @@
+ #include <bits/c++config.h>
+ 
+ #ifdef _GLIBCXX_USE_C99_STDINT_TR1
+-# if defined (__UINT_LEAST16_TYPE__) && defined(__UINT_LEAST32_TYPE__)
+-namespace std
+-{
+-  typedef __UINT_LEAST16_TYPE__ uint_least16_t;
+-  typedef __UINT_LEAST32_TYPE__ uint_least32_t;
+-}
+-# else
+-#  include <cstdint>
+-# endif
++#include <cstdint>
+ #endif
+ 
+ namespace std _GLIBCXX_VISIBILITY(default)