Use high quality uuid_generate on Linux instead of PRNG

src/tools/quuid.cpp

@@ -389,6 +389,18 @@ QUuid QUuid::createUuid()
     return result;
 }
 #else // !Q_OS_WIN32
+#if defined(Q_OS_LINUX)
+#include <uuid/uuid.h>
+QUuid QUuid::createUuid()
+{
+    uuid_t raw_uuid;
+    char uuid_string[37];
+
+    uuid_generate(raw_uuid);
+    uuid_unparse(raw_uuid, uuid_string);
+    return QUuid(uuid_string);
+}
+#else // !Q_OS_LINUX
 #include "qdatetime.h"
 #include "stdlib.h" // For srand/rand
 QUuid QUuid::createUuid()
@@ -417,5 +429,6 @@ QUuid QUuid::createUuid()
 
     return result;
 }
+#endif // !Q_OS_LINUX
 #endif // !Q_OS_WIN32