voice: Add Spanish (Mexican) to the nightly voice sets.

This uses the piper engine.

Peninsular Spanish sounds markedly different from Central/South American
Spanish, so it seems prudent to offer both.

...We'll see how the masses feel.

Change-Id: Idfd3edd92c2dde7f9288afd99f474e59984689c9

docs/CREDITS

@@ -729,6 +729,7 @@ Hoseok Seo
 Paul Sauro
 Dmitry Prozorov
 Mustafa YILDIZ
+Lianela Sky
 
 The libmad team
 The wavpack team

tools/builds.pm

@@ -709,13 +709,13 @@ sub simbuilds {
 	'lang' => 'espanol',
 	'name' => 'Spanish (Mexican)',
         'short' => 'es-mx',
-        'defengine' => 'espeak', ### Use gtts instead?
+        'defengine' => 'piper',
 	'engines' => {
 	    'espeak' => '-ves -k 6',
             'gtts' => '-l es -t mx',
-            # No piper voice yet.
+            'piper' => 'es_ES-claude-high.onnx',
 	},
-        'enabled' => 0,
+        'enabled' => 1,
     },
     'francais' => {
 	'lang' => 'francais',

tools/voice.pl

@@ -97,6 +97,7 @@ my %gtts_lang_map = (
     'eesti' => '-l et',
     'english-us' => '-l en -t us',
     'espanol' => '-l es',
+#    'espanol' => '-l es -t mx',
     'francais' => '-l fr',
     'greek' => '-l el',
     'italiano' => '-l it',
@@ -122,6 +123,7 @@ my %espeak_lang_map = (
     'eesti' => '-vet',
     'english-us' => '-ven-us -k 5',
     'espanol' => '-ves',
+#    'espanol' => '-ves -k 6',
     'francais' => '-vfr-fr',
     'greek' => '-vel',
     'italiano' => '-vit',
@@ -148,6 +150,7 @@ my %piper_lang_map = (
 #    'eesti' => '-vet',
     'english-us' => 'en_US-lessac-high.onnx',
     'espanol' => 'es_ES-sharvard-medium.onnx',
+#    'espanol' => 'es_ES-claude-high.onnx',
     'francais' => 'fr_FR-siwis-medium.onnx',
     'greek' => 'el_GR-rapunzelina-low.onnx',
     'italiano' => 'it_IT-paola-medium.onnx',