accept sh.exe from env.Path as well as from env.PATH to be able to run the tests

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@1095784 13f79535-47bb-0310-9956-ffa450edef68

src/etc/testcases/taskdefs/exec/exec.xml

@@ -28,6 +28,8 @@
         <available file="sh" filepath="${env.PATH}" property="sh.executable"/>
         <!-- CYGWIN -->
         <available file="sh.exe" filepath="${env.PATH}" property="sh.exe.executable"/>
+        <!-- WINDOWS + CYGWIN -->
+        <available file="sh.exe" filepath="${env.Path}" property="sh.exe.executable"/>
         <condition property="test.can.run">
             <or>
                 <isset property="sh.executable"/>