bc: include basic calculator in ramdisk

Change-Id: Ia16fc28a234396e996e84de8496294b26053869b
diff --git a/Android.mk b/Android.mk
index 8cdf057..effab7f 100755
--- a/Android.mk
+++ b/Android.mk
@@ -392,6 +392,7 @@
     relink_libraries \
     relink_binaries \
     twrp_ramdisk \
+    bc \
     dump_image \
     erase_image \
     flash_image \