dev-java/openjdk-sts-bin: updated to latest openjdk-15

Despite I retired as maintainer, I decide to
update that package (why not? Only 5 minutes).
May be I continue maintaining faster in 2021

Package-Manager: Portage-3.0.8, Repoman-3.0.2
Signed-off-by: Denis Reva <denis7774@gmail.com>

dev-java/openjdk-sts-bin/files/openjdk-sts-bin-15.env.sh

@@ -0,0 +1,16 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+VERSION="AdoptOpenJDK ${PV}"
+JAVA_HOME="${EPREFIX}/opt/${P}"
+JDK_HOME="${EPREFIX}/opt/${P}"
+JAVAC="\${JAVA_HOME}/bin/javac"
+PATH="\${JAVA_HOME}/bin"
+ROOTPATH="\${JAVA_HOME}/bin"
+LDPATH="\${JAVA_HOME}/lib/:\${JAVA_HOME}/lib/server/"
+MANPATH=""
+PROVIDES_TYPE="JDK JRE"
+PROVIDES_VERSION="${SLOT}"
+BOOTCLASSPATH=""
+GENERATION="2"
+ENV_VARS="JAVA_HOME JDK_HOME JAVAC PATH ROOTPATH LDPATH MANPATH"