Add wxDynamicLibrary::GetModuleFromAddress().

Use dladdr() under Unix, if available, to provide the same functionality as we
get from GetModuleHandleEx() under MSW and export it in a new public function.

Closes #15248.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76114 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

configure.in

@@ -5442,6 +5442,12 @@ if test "$TOOLKIT" != "MSW" -a "$USE_OS2" != 1; then
                         AC_CHECK_LIB(dl, dlerror, AC_DEFINE(HAVE_DLERROR))
                     ]
                 )
+                AC_CHECK_FUNCS(dladdr,
+                    AC_DEFINE(HAVE_DLADDR),
+                    [
+                        AC_CHECK_LIB(dl, dladdr, AC_DEFINE(HAVE_DLADDR))
+                    ]
+                )
             fi
         fi