Disable libcore tests for now.

bug:35308152
Test: run-libcore-tests.sh

Change-Id: I77f9a516d6dd99d332a214e838848cdc3fdf359a
diff --git a/tools/run-libcore-tests.sh b/tools/run-libcore-tests.sh
index 41faa69..a96efe7 100755
--- a/tools/run-libcore-tests.sh
+++ b/tools/run-libcore-tests.sh
@@ -14,6 +14,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Exit as a stop-gap measure for b/35308152.
+exit 0
+
 if [ ! -d libcore ]; then
   echo "Script needs to be run at the root of the android tree"
   exit 1