Adding #include <dlfcn.h> in profiler.cc to pass build (#1632)

w/o the header, experience following errors:
```
error: use of undeclared identifier 'RTLD_NOW'
error: use of undeclared identifier 'RTLD_LOCAL'
error: use of undeclared identifier 'dlerror'
error: use of undeclared identifier 'dlsym'
error: use of undeclared identifier 'dlclose'
```

src/misc/profiler.cc

@@ -11,6 +11,7 @@
 #include "utils.h"
 #include "proxy.h"
 #include "profiler.h"
+#include <dlfcn.h>
 
 static pthread_mutex_t profilerLock = PTHREAD_MUTEX_INITIALIZER;
 static int profilerPluginRefCount;