Enter keystore password without echo.

android-sdk-linux.patch

--- android-sdk-linux/tools/ant/build.xml.orig  2013-02-06 13:26:17.211067737 +0100
+++ android-sdk-linux/tools/ant/build.xml       2013-02-06 13:25:42.002053657 +0100
@@ -1043,10 +1043,14 @@
         <!-- Gets passwords -->
         <input
                 message="Please enter keystore password (store:${key.store}):"
-                                                               addproperty="key.store.password" />
+                addproperty="key.store.password">
+                                                         <handler classname="org.apache.tools.ant.input.SecureInputHandler" />
+                                                       </input>
         <input
                 message="Please enter password for alias '${key.alias}':"
-                                                               addproperty="key.alias.password" />
+                addproperty="key.alias.password">
+                                                         <handler classname="org.apache.tools.ant.input.SecureInputHandler" />
+                                                       </input>
     </target>
 
     <!-- called through target 'release'. Only executed if there's no