When passed an argument with nested quotes, such as `'-DFOO="bar < baz"'`, the Unix Gradle wrapper script from version 3.2 fails because it tries to pipe input from the `baz` file - the argument is not correctly escaped.

Expected Behavior
`./gradlew '-DFOO="bar < baz"'` should escape its arguments correctly when executing Gradle

Current Behavior
`./gradlew '-DFOO="bar < baz"'` fails with `No such file or directory` (assuming the `baz` file does not exist)

Context
This pattern of nested quotes is produced by Jenkins' Gradle integration, and it will always contain a `<` when triggered by Gerrit integration. Our continuous integration is broken by this bug.

Steps to Reproduce (for bugs)

• Clone https://github.com/delego-wlritchi/gradle-wrapper-bug
• Run `./gradlew '-DFOO="bar < baz"' hello`

Your Environment

• Gradle Version: 3.2
• Last worked correctly in: 3.1
• Operating System: Arch Linux 64-bit
• JVM version: OpenJDK 1.8.0_112