lang: The "InvalidVoice" language file wasn't being included properly

It ended up inside the 'langs/voicestrings.zip' with an absolute path
when it should of landed in langs/ directly.

Change-Id: I308b551e627d63142ec8871ccfb72b6036eff3d2

apps/lang/SOURCES

@@ -46,4 +46,3 @@ hindi.lang
 japanese.lang
 korean.lang
 thai.lang
-InvalidVoice_english.talk

tools/buildzip.pl

@@ -616,7 +616,8 @@ sub buildzip {
     # copy the already built lng files
     glob_copy('apps/lang/*.lng', "$temp_dir/langs/");
     glob_copy('apps/lang/*.zip', "$temp_dir/langs/");
-    glob_copy('apps/lang/*.talk', "$temp_dir/langs/");
+    # Copy over the Invalid Language fallback stuff
+    glob_copy("$ROOT/apps/lang/Invalid*.talk", "$temp_dir/langs/");
 
     # copy the .lua files
     glob_mkdir("$temp_dir/rocks/viewers/lua/");