Extend support for the German MBROLA voices.

CHANGELOG.md

 new languages:
 
 *  mb-br2 (Brazillian Portuguese)
+*  mb-de\* (German) : extend support coverage of the German MBROLA voices
 *  mb-lt1 (Lithuanian) -- embar
 *  mb-lt2 (Lithuanian) -- embar
 *  mt (Maltese)

espeak-data/voices/mb/mb-de1

+name german-mbrola-1
+language de 6
+gender female
+voicing 80
+pitch 140 220
+
+mbrola de1 de2_phtrans
+

espeak-data/voices/mb/mb-de1-en

+name en-german-1
+language en 9
+gender female
+
+voicing 80
+pitch 140 220
+
+mbrola de1 de2_phtrans
+

espeak-data/voices/mb/mb-de2-en

+name en-german-2
+language en 9
+gender male
+
+voicing 80
+
+mbrola de2 de2_phtrans
+

espeak-data/voices/mb/mb-de3-en

+name en-german-3
+language en 9
+gender female
+
+voicing 80
+pitch 140 220
+
+mbrola de3 de2_phtrans
+

espeak-data/voices/mb/mb-de4-en

-name en-german
+name en-german-4
 language en 9
 gender male
 

espeak-data/voices/mb/mb-de6-en

+name en-german-6
+language en 9
+gender male
+
+mbrola de6 de6_phtrans 22050
+