mime.types: add missing emf and wmf

These exist in debian 11's /etc/mimetypes but not on debian 10. This
was causing testOooHandler failures on debian 10

cloudooo/mime.types

@@ -610,6 +610,7 @@ chemical/x-xtel					xtel
 chemical/x-xyz					xyz
 
 image/cgm
+image/emf                                       emf
 image/g3fax
 image/gif					gif
 image/ief					ief
@@ -639,6 +640,7 @@ image/vnd.net-fpx
 image/vnd.svf
 image/vnd.wap.wbmp				wbmp
 image/vnd.xiff
+image/wmf                                       wmf
 image/x-canon-cr2				cr2
 image/x-canon-crw				crw
 image/x-cmu-raster				ras