Use shared-library sonames for runtime dlopen paths.

Installed plugin libs ship libFoo.so.N without the linker namelink
(libFoo.so); load by soname so snaps and NAMELINK_SKIP installs work.

Co-authored-by: Cursor <cursoragent@cursor.com>

stimBuffApis/xcbWindow/xcbWindow.cpp

@@ -223,9 +223,9 @@ static sscl::co::ViralNonPostingInvoker<int> xcbWindow_initializeCInd(void)
     }
 
     // Try to load libxcbXorg using the search path hook
-    auto libPath = smoHooksPtr->searchForLibInSmoSearchPaths("libxcbXorg.so");
+    auto libPath = smoHooksPtr->searchForLibInSmoSearchPaths("libxcbXorg.so.0");
     xcbXorg.dlopenHandle = dlopen(
-        libPath.value_or("libxcbXorg.so").c_str(),
+        libPath.value_or("libxcbXorg.so.0").c_str(),
         RTLD_LAZY);
 
     if (!xcbXorg.dlopenHandle)