fix make for a21, PIDs are always ints, linter things

kernel/sync/semaphore.h

@@ -24,15 +24,17 @@ class Thread;
 class Semaphore {
 	// Prevent copies and assignments
 	Semaphore(const Semaphore&) = delete;
+	Semaphore(Semaphore&&) = delete;
 	Semaphore& operator=(const Semaphore&) = delete;
+	Semaphore& operator=(Semaphore&&) = delete;
 	unsigned counter;
 	Queue<Thread> waiting;
 
    public:
-	/*! \brief Constructor; initialized the counter with provided value `c`
-	 *  \param c Initial counter value
+	/*! \param init Initial counter value
 	 */
-	explicit Semaphore(unsigned c = 0) : counter(c) {}
+	explicit Semaphore(unsigned init = 0) : counter(init) {}
+	~Semaphore() = default;
 
 	/*! \brief Wait for access to the critical area.
 	 *