Make ramdisk_available.

Test: pass
Bug: 147347110
Change-Id: I142311a7558a19d209bcd63207a88e12cf6f130e
diff --git a/libm/Android.bp b/libm/Android.bp
index 801129a..d4cdd7b 100644
--- a/libm/Android.bp
+++ b/libm/Android.bp
@@ -6,6 +6,7 @@
 cc_library {
     name: "libm",
     defaults: ["linux_bionic_supported"],
+    ramdisk_available: true,
     recovery_available: true,
     static_ndk_lib: true,