Skip DroidBench tests on Windows, for now

The default location of DroidBench in "/tmp/DroidBench" does not work
well on Windows. So let's disable these tests until someone has time to
make that path more portable.

com.ibm.wala.dalvik.test/build.gradle

@@ -120,8 +120,6 @@ dependencies {
 }
 
 processTestResources {
-	dependsOn unpackDroidBench
-
 	from copyAndroidJar
 	from downloadSampleCup
 	from downloadSampleLex
@@ -132,6 +130,11 @@ processTestResources {
 	from testdata.downloadJavaCup
 }
 
+if (isWindows)
+	test.exclude '**/droidbench/**'
+else
+	processTestResources.dependsOn unpackDroidBench
+
 test {
 	maxHeapSize = '800M'
 }