added 1.3.0-beta4 to prebuilts

Change-Id: I11e15a9091a4d29c7f226301ec16d185e73e118c
diff --git a/com/android/tools/common/24.3.0-beta4/common-24.3.0-beta4-sources.jar.md5 b/com/android/tools/common/24.3.0-beta4/common-24.3.0-beta4-sources.jar.md5
new file mode 100644
index 0000000..f904c97
--- /dev/null
+++ b/com/android/tools/common/24.3.0-beta4/common-24.3.0-beta4-sources.jar.md5
@@ -0,0 +1 @@
+b1d165ce5d2e96e78bc4aa243b618429
\ No newline at end of file