Fix some CI issues

Author: ldionne

libcxx/include/__hash_table

@@ -26,6 +26,7 @@
 #include <__memory/pointer_traits.h>
 #include <__memory/swap_allocator.h>
 #include <__memory/unique_ptr.h>
+#include <__new/launder.h>
 #include <__type_traits/can_extract_key.h>
 #include <__type_traits/conditional.h>
 #include <__type_traits/enable_if.h>
@@ -46,7 +47,6 @@
 #include <__utility/swap.h>
 #include <cstring>
 #include <limits>
-#include <new> // __launder
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header

libcxx/test/std/language.support/support.dynamic/alloc.errors/bad.alloc/bad_alloc.pass.cpp

@@ -9,8 +9,9 @@
 // test bad_alloc
 
 #include <new>
-#include <type_traits>
 #include <cassert>
+#include <exception>
+#include <type_traits>
 
 #include "test_macros.h"
 

libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.placement/new_array.pass.cpp

@@ -10,6 +10,7 @@
 
 #include <new>
 #include <cassert>
+#include <cstddef>
 
 #include "test_macros.h"
 

libcxx/test/std/language.support/support.dynamic/ptr.launder/launder.types.verify.cpp

@@ -26,11 +26,11 @@ int main(int, char**)
     (void) std::launder((               void *) nullptr);
     (void) std::launder((const          void *) nullptr);
     (void) std::launder((      volatile void *) nullptr);
-    (void) std::launder((const volatile void *) nullptr);  // expected-error-re@new:* 4 {{static assertion failed{{.*}}can't launder cv-void}}
-    // expected-error@new:* 0-4 {{void pointer argument to '__builtin_launder' is not allowed}}
+    (void) std::launder((const volatile void *) nullptr);  // expected-error-re@*:* 4 {{static assertion failed{{.*}}can't launder cv-void}}
+    // expected-error@*:* 0-4 {{void pointer argument to '__builtin_launder' is not allowed}}
 
-    (void) std::launder(foo);                              // expected-error-re@new:* 1 {{static assertion failed{{.*}}can't launder functions}}
-    // expected-error@new:* 0-1 {{function pointer argument to '__builtin_launder' is not allowed}}
+    (void) std::launder(foo);                              // expected-error-re@*:* 1 {{static assertion failed{{.*}}can't launder functions}}
+    // expected-error@*:* 0-1 {{function pointer argument to '__builtin_launder' is not allowed}}
 
   return 0;
 }

libcxx/test/std/utilities/memory/default.allocator/allocator.members/allocate.size.pass.cpp

@@ -14,6 +14,7 @@
 
 #include <memory>
 #include <cassert>
+#include <cstddef>
 #include <new>
 
 #include "test_macros.h"