[libcxx] [test] Add missing <stdexcept> in several tests.

Reviewed as https://reviews.llvm.org/D50420

llvm-svn: 339209
diff --git a/libcxx/test/std/utilities/template.bitset/bitset.members/test.pass.cpp b/libcxx/test/std/utilities/template.bitset/bitset.members/test.pass.cpp
index 084dc9f8..4a1c0e2 100644
--- a/libcxx/test/std/utilities/template.bitset/bitset.members/test.pass.cpp
+++ b/libcxx/test/std/utilities/template.bitset/bitset.members/test.pass.cpp
@@ -12,6 +12,7 @@
 #include <bitset>
 #include <cstdlib>
 #include <cassert>
+#include <stdexcept>
 
 #include "test_macros.h"