gnu: java-tomcat: Build the full Tomcat package.

gnu: java-tomcat: Build the full Tomcat package.

Currently java-tomcat uses the "package" build-target. In that way, it is
built like a library, with only the jar files. This commit will change the
build-target to "deploy" in order to build the full tomcat package.

* gnu/packages/web.scm (java-tomcat)[source]: Remove bat-files in snippet.
[inputs]: Remove java-eclipse-jdt-core, add java-commons-daemon, java-ecj.
[native-inputs]: Remove.
[arguments]: Use "deploy" build-target, add phases 'modify-deploy,
'symlink-commons-daemon,  'symlink-java-ecj, change 'install phase.