Clean up libstdc++ includes slightly.

	* include/bits/shared_ptr_base.h: Add required header.
	* include/std/condition_variable: Likewise.
	* include/std/mutex: Remove unused header.
	* include/std/shared_mutex: Remove redundant header.
	(shared_mutex::shared_mutex()): Replace throw with __throw_bad_alloc.

From-SVN: r227469

libstdc++-v3/ChangeLog

 2015-09-03  Jonathan Wakely  <jwakely@redhat.com>
 
+	* include/bits/shared_ptr_base.h: Add required header.
+	* include/std/condition_variable: Likewise.
+	* include/std/mutex: Remove unused header.
+	* include/std/shared_mutex: Remove redundant header.
+	(shared_mutex::shared_mutex()): Replace throw with __throw_bad_alloc.
+
 	PR libstdc++/66902
 	* src/c++11/debug.cc (_S_debug_messages): Make array const.
 

libstdc++-v3/include/bits/shared_ptr_base.h

@@ -49,6 +49,7 @@
 #ifndef _SHARED_PTR_BASE_H
 #define _SHARED_PTR_BASE_H 1
 
+#include <typeinfo>
 #include <bits/allocated_ptr.h>
 #include <ext/aligned_buffer.h>
 
@@ -67,8 +68,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   class bad_weak_ptr : public std::exception
   {
   public:
-    virtual char const*
-    what() const noexcept;
+    virtual char const* what() const noexcept;
 
     virtual ~bad_weak_ptr() noexcept;    
   };

libstdc++-v3/include/std/condition_variable

@@ -42,6 +42,7 @@
 #include <bits/allocator.h>
 #include <bits/unique_ptr.h>
 #include <bits/shared_ptr.h>
+#include <bits/cxxabi_forced.h>
 
 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
 

libstdc++-v3/include/std/mutex

@@ -44,7 +44,6 @@
 #include <bits/functexcept.h>
 #include <bits/gthr.h>
 #include <bits/move.h> // for std::swap
-#include <bits/cxxabi_forced.h>
 
 #ifdef _GLIBCXX_USE_C99_STDINT_TR1
 

libstdc++-v3/include/std/shared_mutex

@@ -36,7 +36,6 @@
 #else
 
 #include <bits/c++config.h>
-#include <mutex>
 #include <condition_variable>
 #include <bits/functexcept.h>
 
@@ -80,7 +79,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     {
       int __ret = pthread_rwlock_init(&_M_rwlock, NULL);
       if (__ret == ENOMEM)
-	throw bad_alloc();
+	__throw_bad_alloc();
       else if (__ret == EAGAIN)
 	__throw_system_error(int(errc::resource_unavailable_try_again));
       else if (__ret == EPERM)