dev-java/cpptasks: Use EAPI 8, min Java 1.8, enable tests

Signed-off-by: Yuan Liao <liaoyuan@gmail.com>
Closes: https://github.com/gentoo/gentoo/pull/23812
Signed-off-by: Miroslav Šulc <fordfrog@gentoo.org>

dev-java/cpptasks/files/cpptasks-1.0_beta5-test-classpath.patch

@@ -0,0 +1,33 @@
+From 732e296e780633e3dce1bace28a4abae04f506c7 Mon Sep 17 00:00:00 2001
+From: Yuan Liao <liaoyuan@gmail.com>
+Date: Sat, 15 Jan 2022 10:58:28 -0800
+Subject: [PATCH] Prevent test classpath from being overwritten by
+ java-ant-2.eclass
+
+Signed-off-by: Yuan Liao <liaoyuan@gmail.com>
+---
+ build.xml | 8 ++++++--
+ 1 file changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/build.xml b/build.xml
+index ed3a0f7..24a3114 100644
+--- a/build.xml
++++ b/build.xml
+@@ -176,8 +176,12 @@
+            deprecation="false"
+            target="${javac.target}"
+            source="${javac.source}"
+-           optimize="false"
+-           classpath="${build.lib}/${name}.jar;${java.class.path}"/>
++           optimize="false">
++        <classpath>
++            <pathelement location="${build.lib}/${name}.jar" />
++            <pathelement location="${java.class.path}" />
++        </classpath>
++    </javac>
+     <jar jarfile="${tests.build.lib}/${name}_test.jar">
+             <fileset dir="." includes="NOTICE LICENSE"/>
+             <fileset dir="${tests.build.classes}"/>
+-- 
+2.34.1
+