[lldb/API] Add missing eBroadcastBitSymbolsChanged to SBTarget (NFC) (llvm#85883)

This patch exposes the missing `eBroadcastBitSymbolsChanged` event bit
in `SBTarget`.

Signed-off-by: Med Ismail Bennani <[email protected]>

Author: medismailben

lldb/include/lldb/API/SBTarget.h

@@ -41,7 +41,8 @@ class LLDB_API SBTarget {
     eBroadcastBitModulesLoaded = (1 << 1),
     eBroadcastBitModulesUnloaded = (1 << 2),
     eBroadcastBitWatchpointChanged = (1 << 3),
-    eBroadcastBitSymbolsLoaded = (1 << 4)
+    eBroadcastBitSymbolsLoaded = (1 << 4),
+    eBroadcastBitSymbolsChanged = (1 << 5),
   };
 
   // Constructors