Add missing include

Change-Id: I454b39a76595aedbbe1ca64f9b1982e5c27623cd
Reviewed-on: https://gerrit.libreoffice.org/22708Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: David Ostrovsky <david@ostrovsky.org>

bridges/source/cpp_uno/msvc_win32_intel/except.cxx

@@ -28,6 +28,7 @@
 #include "rtl/strbuf.hxx"
 #include "rtl/ustrbuf.hxx"
 #include <sal/log.hxx>
+#include <osl/mutex.hxx>
 
 #include "com/sun/star/uno/Any.hxx"
 #include <unordered_map>