Use unversioned third_party/gradle directory

Change-Id: Id691663396fbd51b9d6fea01a675825f8a32c45e

tools/gradle.py

diff --git a/tools/gradle.py b/tools/gradle.py
index 5e1fdc3..ef77a5c 100755
--- a/tools/gradle.py
+++ b/tools/gradle.py
@@ -15,17 +15,16 @@
 import jdk
 import utils
 
-GRADLE_DIR = os.path.join(utils.REPO_ROOT, 'third_party', 'gradle')
-GRADLE8_SHA1 = os.path.join(GRADLE_DIR, 'gradle-8.6.tar.gz.sha1')
-GRADLE8_TGZ = os.path.join(GRADLE_DIR, 'gradle-8.6.tar.gz')
+GRADLE8_SHA1 = os.path.join(utils.THIRD_PARTY, 'gradle.tar.gz.sha1')
+GRADLE8_TGZ = os.path.join(utils.THIRD_PARTY, 'gradle.tar.gz')
 
 
 def get_gradle():
-    gradle_dir = 'gradle-8.6'
+    gradle_dir = os.path.join(utils.THIRD_PARTY, 'gradle')
     if utils.IsWindows():
-        return os.path.join(GRADLE_DIR, gradle_dir, 'bin', 'gradle.bat')
+        return os.path.join(gradle_dir, 'bin', 'gradle.bat')
     else:
-        return os.path.join(GRADLE_DIR, gradle_dir, 'bin', 'gradle')
+        return os.path.join(gradle_dir, 'bin', 'gradle')
 
 
 def ParseOptions():