Update build.gradle

[manizzle]

~/Development/pentests/tools/qu1ckr00t master * gradle wrapper

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':app'.
> Failed to notify project evaluation listener.
   > org.gradle.api.tasks.compile.CompileOptions.setBootClasspath(Ljava/lang/String;)V

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 3s
~/Development/pentests/tools/qu1ckr00t master * git diff

Without this diff, I get this.