Move OpenALSoft source files to build directory

Move the zip file downloaded from OpenALSoft and the extraction folder to within the build folder so that are ignored by git and cleaned appropriately.

jme3-android-native/openalsoft.gradle

@@ -5,7 +5,7 @@ String openALSoftZipFile = 'OpenALSoft.zip'
 // OpenAL Soft directory the download is extracted into
 // Typically, the downloaded OpenAL Soft zip file will extract to a directory
 // called "openal-soft"
-String openALSoftFolder = 'openal-soft'
+String openALSoftFolder = 'openal-soft-e5016f8'
 
 //Working directories for the ndk build.
 String openalsoftBuildDir = "${buildDir}" + File.separator + 'openalsoft'
@@ -21,19 +21,19 @@ String openalsoftJmeAndroidPath = 'src/native/jme_openalsoft'
 // Download external source files if not available
 task downloadOpenALSoft(type: MyDownload) {
     sourceUrl = openALSoftUrl
-    target = file(openALSoftZipFile)
+    target = file(openalsoftBuildDir + File.separator + openALSoftZipFile)
 }
 
 // Unzip external source files
 task unzipOpenALSoft(type: Copy) {
-    def zipFile = file(openALSoftZipFile)
+    def zipFile = file(openalsoftBuildDir + File.separator + openALSoftZipFile)
-    def outputDir = file(".")
+    def outputDir = file(openalsoftBuildDir)
 
     from zipTree(zipFile)
     into outputDir
 }
 unzipOpenALSoft.dependsOn {
-    def zipFilePath = project.projectDir.absolutePath + File.separator + openALSoftZipFile
+    def zipFilePath = openalsoftBuildDir + File.separator + openALSoftZipFile
     def zipFile = new File(zipFilePath)
 //    println "zipFile path: " + zipFile.absolutePath
 //    println "zipFile exists: " + zipFile.exists()
@@ -44,7 +44,7 @@ unzipOpenALSoft.dependsOn {
 
 // Copy external source files to jni directory
 task copyOpenALSoft(type: Copy) {
-    def sourceDir = file(openALSoftFolder)
+    def sourceDir = file(openalsoftBuildDir + File.separator + openALSoftFolder)
     def outputDir = file(openalsoftBuildJniDir)
 //    println "copyOpenALSoft sourceDir: " + sourceDir
 //    println "copyOpenALSoft outputDir: " + outputDir