debugger: also accept external debug info as hint for a debug build

Change-Id: I97cc6cdf6b1f2b8f794ad166c0f2b3f8eadc98b8
Reviewed-by: Christian Kandeler <christian.kandeler@nokia.com>

src/plugins/debugger/gdb/gdbengine.cpp

@@ -5403,7 +5403,10 @@ void GdbEngine::checkForReleaseBuild()
         return;
     }
 
-    if (elfData.indexOf(".debug_info") >= 0)
+    bool hasEmbeddedInfo = elfData.indexOf(".debug_info") >= 0;
+    bool hasBuildId = elfData.indexOf(".note.gnu.build-id") >= 0;
+    bool hasLink = elfData.indexOf(".gnu_debuglink") >= 0;
+    if (hasEmbeddedInfo || hasBuildId || hasLink)
         return;
 
     QString warning;