[fix] Fix unavailable jetbrains repository

[Makentoshe]

Jetbrains repository server does not works and dependencies updating fails with error:

BUILD FAILED
P:\android\projects\anko\anko-jetbrains-alt\update_dependencies.xml:29: The following error occurred while executing this line:
P:\android\projects\anko\anko-jetbrains-alt\update_dependencies_idea.xml:141: The following error occurred while executing this line:
P:\android\projects\anko\anko-jetbrains-alt\update_dependencies_idea.xml:104: Can't get http://repository.jetbrains.com/remote-repos/net/sf/proguard/proguard-base/5.1/proguard-base-5.1.jar to P:\android\projects\anko\anko-jetbrains-alt\dependencies\download\proguard-base-5.1.jar

So this way the repository server url was replaced by maven