...or else mapException would extract garbage from the fake
exception->exceptionType std::type_info* when catching via
cppu::getCaughtException the rethrown exception thrown via
std::rethrow_exception in Test::testgetCaughtException in
cppuhelper/qa/misc/test_misc.cxx.

6ddecf61 "fillUnoException not working on
std::rethrow_exception exceptions" had adapted the other relevant
bridges/source/cpp_uno/gcc3_*/ cases but missed the gcc3_linux_aarch64 one.

Change-Id: I5a2afb11ad4abf851169bd3fd8ae647cc81c2fcd
Reviewed-on: https://gerrit.libreoffice.org/67542
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>