Make ramdisk_available.

Test: pass
Bug: 147347110
Change-Id: I6ca84fcab63a8b428bffb4d6050362fc492d9c44
diff --git a/Android.bp b/Android.bp
index 1ab866a..5425e80 100644
--- a/Android.bp
+++ b/Android.bp
@@ -53,6 +53,7 @@
     name: "libunwind_llvm",
     sdk_version: "21",
     vendor_available: true,
+    ramdisk_available: true,
     recovery_available: true,
     native_bridge_supported: true,
     srcs: LIBUNWIND_SRC_FILES,