Debugger: Fix qbs build.

Change-Id: Ifbdbfb401a72dc2e971639c56525108a8360c3ea
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>

src/plugins/debugger/debugger.qbs

@@ -211,6 +211,8 @@ QtcPlugin {
         "images/location_24.png",
         "images/tracepoint.png",
         "images/watchpoint.png",
+        "lldb/lldbengine.cpp",
+        "lldb/lldbengine.h",
         "lldblib/ipcenginehost.cpp",
         "lldblib/ipcenginehost.h",
         "lldblib/lldbenginehost.cpp",