voice: Add support for voicing Latvian. Disabled by default.

Change-Id: Ieeec14bf259518232fb158a87abab7d4e58362c8

tools/builds.pm

@@ -779,6 +779,18 @@ sub simbuilds {
 	},
         'enabled' => 1,
     },
+    'latviesu' => {
+	'lang' => 'latviesu',
+	'name' => 'Latviešu (Latvian)',
+        'short' => 'lv',
+        'defengine' => 'piper',
+	'engines' => {
+	    'espeak' => '-vlv',
+	    'gtts' => '-l lv',
+            'piper' => 'lv_LV-aivars-medium.onnx',
+	},
+	'enabled' => 0,
+    },
     'nederlands' => {
 	'lang' => 'nederlands',
 	'name' => 'Nederlands (Dutch)',

tools/voice.pl

@@ -103,6 +103,7 @@ my %gtts_lang_map = (
     'italiano' => '-l it',
     'japanese' => '-l ja',
     'korean' => '-l ko',
+    'latviesu' => '-l lv',
     'magyar' => '-l hu',
     'nederlands' => '-l nl',
     'norsk' => '-l no',
@@ -130,6 +131,7 @@ my %espeak_lang_map = (
     'italiano' => '-vit',
     'japanese' => '-vja',
     'korean' => '-vko',
+    'latviesu' => '-vlv',
     'magyar' => '-vhu',
     'nederlands' => '-vnl',
     'norsk' => '-vno',
@@ -157,6 +159,7 @@ my %piper_lang_map = (
     'italiano' => 'it_IT-paola-medium.onnx',
 #    'japanese' => '-vja',
 #    'korean' => '-vko',
+    'latviesu' => 'lv_LV-aivars-medium.onnx',
     'magyar' => 'hu_HU-anna-medium.onnx',
     'nederlands' => 'nl_NL-mls-medium.onnx',
     'norsk' => 'no_NO-talesyntese-medium.onnx',