Re-add removed voicesmith build and shorter summary

metadata/de.jurihock.voicesmith.txt

@@ -6,7 +6,7 @@ Issue Tracker:http://github.com/jurihock/voicesmith/issues
 Donate:https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=RDZAFKVYQJYFA
 
 Auto Name:Voicesmith
-Summary:Real-time voice changer and altered auditory feedback app
+Summary:Real-time voice changer
 Description:
 Voicesmith records an audio signal from the built-in microphone, processes it
 in some way and plays it back through the earphones in real-time. There are
@@ -18,6 +18,17 @@ Frequency-Shifted Auditory Feedback (FAF).
 Repo Type:git
 Repo:git://github.com/jurihock/voicesmith.git
 
+# Supported build version 2.1
+# (but custom commit number, not the tagged one)
+Build:2.1,7
+    commit=21e96e1cd
+    subdir=voicesmith
+    submodules=yes
+    target=android-8
+    update=.;../greendroid/GreenDroid
+    buildjni=yes
+
+# Build versions >= 2.2 are compatible with tags mode
 Build:2.2,8
     commit=v2.2_r8
     subdir=voicesmith
@@ -46,8 +57,6 @@ Build:2.5,11
     commit=v2.5_r11
     subdir=voicesmith
     submodules=yes
-    target=android-8
-    update=.;../greendroid/GreenDroid
     buildjni=yes
 
 Auto Update Mode:None