CreateStartScripts issues

[rgoldberg]

CreateStartScripts issues:

• remove main class from command line
  invocation commandline in start scripts is wrong gradle/gradle-java-modules#14
• remove classpath from command line
  invocation commandline in start scripts is wrong gradle/gradle-java-modules#14
• move --module <module> to right before args for main method
  invocation commandline in start scripts is wrong gradle/gradle-java-modules#14
• cygwin
  generated unix start script does not work properly on Cygwin gradle/gradle-java-modules#12
• --patch-module libs must be in libs-patch instead of libs
  Please also transport the --patch-module flags to the start scripts zyxist/chainsaw#20
• OS-agnostic CreateStartScripts
  CreateStartScripts support for OS-agnostic inputs and for characters that it currently replaces gradle/gradle#6239