Add ramdisk_available to init_first_stage's deps

Bug: 187196593
Test: boot
Change-Id: I9d5a1066103ae578fd085d0db2201b4650ca7827
diff --git a/Android.bp b/Android.bp
index 962f5a4..176a49d 100644
--- a/Android.bp
+++ b/Android.bp
@@ -32,6 +32,7 @@
 cc_library_static {
     name: "libmodpb64",
     host_supported: true,
+    ramdisk_available: true,
     recovery_available: true,
     vendor_available: true,
     srcs: ["modp_b64.cc"],