tdf#123452 EMF Re-enable compression for image/x-emf files

Change-Id: I9fd801d5eef6c65f8e68e30723415da7b493d767
Reviewed-on: https://gerrit.libreoffice.org/68716
Tested-by: Jenkins
Reviewed-by: László Németh <nemeth@numbertext.org>

svx/source/xml/xmlgrhlp.cxx

@@ -731,6 +731,7 @@ OUString SvXMLGraphicHelper::implSaveGraphic(css::uno::Reference<css::graphic::X
             static const char* aCompressiblePics[] =
             {
                 "image/svg+xml",
+                "image/x-emf",
                 "image/x-wmf",
                 "image/tiff",
                 "image/x-eps",