Add a `release` API to `LockGuard`.

This new `release` API unwraps the lock without unlocking it. This is
useful to call before destroying a lock.

Signed-off-by: Hugo Lefeuvre <hugo.lefeuvre@scisemi.com>

sdk/include/locks.hh

diff --git a/sdk/include/locks.hh b/sdk/include/locks.hh
index 4d1050c..3f7808e 100644
--- a/sdk/include/locks.hh
+++ b/sdk/include/locks.hh
@@ -299,6 +299,16 @@
 	}
 
 	/**
+	 * Unwrap the lock without unlocking it. This is useful to call before
+	 * destroying a lock.
+	 */
+	void release()
+	{
+		wrappedLock = nullptr;
+		isOwned     = false;
+	}
+
+	/**
 	 * If the underlying lock type supports locking with a timeout, try to lock
 	 * it with the specified timeout. This must be called with the lock
 	 * unlocked.  Returns true if the lock has been acquired, false otherwise.