Added 17 aswell as a test

dev-java/openjdk/files/openjdk-17.env.sh

@@ -0,0 +1,16 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+VERSION="OpenJDK ${PV}"
+JAVA_HOME="${EPREFIX}/usr/$(get_libdir)/${PN}-${SLOT}"
+JDK_HOME="${EPREFIX}/usr/$(get_libdir)/${PN}-${SLOT}"
+JAVAC="\${JAVA_HOME}/bin/javac"
+PATH="\${JAVA_HOME}/bin"
+ROOTPATH="\${JAVA_HOME}/bin"
+LDPATH="\${JAVA_HOME}/lib/:\${JAVA_HOME}/lib/server/"
+MANPATH=""
+PROVIDES_TYPE="JDK JRE"
+PROVIDES_VERSION="${SLOT}"
+BOOTCLASSPATH=""
+GENERATION="2"
+ENV_VARS="JAVA_HOME JDK_HOME JAVAC PATH ROOTPATH LDPATH MANPATH"