Reland 'Move libc++ and libc++abi to buildtools.'

third_party/libc++abi/libc++abi.gyp

Index: third_party/libc++abi/libc++abi.gyp
diff --git a/third_party/libc++abi/libc++abi.gyp b/third_party/libc++abi/libc++abi.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..3a12ec594a932332f388bdccb2405c495b81b3bb
--- /dev/null
+++ b/third_party/libc++abi/libc++abi.gyp
@@ -0,0 +1,60 @@
+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{
+  'targets': [
+    {
+      'target_name': 'libc++abi',
+      'type': 'static_library',
+      'dependencies=': [],
+      'sources': [
+        'trunk/src/abort_message.cpp',
+        'trunk/src/cxa_aux_runtime.cpp',
+        'trunk/src/cxa_default_handlers.cpp',
+        'trunk/src/cxa_demangle.cpp',
+        'trunk/src/cxa_exception.cpp',
+        'trunk/src/cxa_exception_storage.cpp',
+        'trunk/src/cxa_guard.cpp',
+        'trunk/src/cxa_handlers.cpp',
+        'trunk/src/cxa_new_delete.cpp',
+        'trunk/src/cxa_personality.cpp',
+        'trunk/src/cxa_unexpected.cpp',
+        'trunk/src/cxa_vector.cpp',
+        'trunk/src/cxa_virtual.cpp',
+        'trunk/src/exception.cpp',
+        'trunk/src/private_typeinfo.cpp',
+        'trunk/src/stdexcept.cpp',
+        'trunk/src/typeinfo.cpp',
+      ],
+      'include_dirs': [
+        'trunk/include',
+        '../libc++/trunk/include'
+      ],
+      'cflags': [
+        '-fstrict-aliasing',
+        '-nostdinc++',
+        '-std=c++11',
+      ],
+      'cflags_cc!': [
+        '-fno-exceptions',
+        '-fno-rtti',
+      ],
+      'cflags!': [
+        '-fvisibility=hidden',
+      ],
+      'ldflags': [
+        '-nodefaultlibs',
+      ],
+      'ldflags!': [
+        '-pthread',
+      ],
+      'libraries': [
+        '-lc',
+        '-lgcc_s',
+        '-lpthread',
+        '-lrt',
+      ]
+    },
+  ]
+}