Merge pull request #8928 from huonw/emit-loaded-module-trace

[JSONSerialization] needs <vector>.

Author: eeckstein

include/swift/Basic/JSONSerialization.h

@@ -27,6 +27,8 @@
 #include "llvm/Support/Regex.h"
 #include "llvm/Support/raw_ostream.h"
 
+#include <vector>
+
 namespace swift {
 namespace json {