Merge pull request #64379 from mhjacobson/freebsd-fix-build-failure-include-cassert

basic: fix FreeBSD build failure around usage of `assert()`

Author: eeckstein

include/swift/Basic/BasicBridging.h

@@ -15,6 +15,7 @@
 
 // Workaround to avoid a compiler error because `cas::ObjectRef` is not defined
 // when including VirtualFileSystem.h
+#include <cassert>
 #include "llvm/CAS/CASReference.h"
 
 #include "swift/Basic/BridgedSwiftObject.h"