Build fuzzing sources against release 8 when eventually running with ART.

Bug: 71834881

Test: fuzzer runs
Change-Id: I8d87098a7affbfc58a3dbbd64db29ff0dbeeaa7e
diff --git a/tools/jfuzz/run_jfuzz_test.py b/tools/jfuzz/run_jfuzz_test.py
index 34180d9..bddce32 100755
--- a/tools/jfuzz/run_jfuzz_test.py
+++ b/tools/jfuzz/run_jfuzz_test.py
@@ -133,7 +133,7 @@
   def CompileOnHost(self):
     if self._dexer == 'dx' or self._dexer == 'd8':
       dbg = '-g' if self._debug_info else '-g:none'
-      if RunCommand(['javac', dbg, 'Test.java'],
+      if RunCommand(['javac', '--release=8', dbg, 'Test.java'],
                     out=None, err=None, timeout=30) == RetCode.SUCCESS:
         dx = 'dx' if self._dexer == 'dx' else 'd8-compat-dx'
         retc = RunCommand([dx, '--dex', '--output=classes.dex'] + glob('*.class'),