Rename bssl-ffi to bssl-sys

Test: TreeHugger
Change-Id: I7e8e1a73d47e2fbdf81a4d6b51d7d11cea56db35
diff --git a/pvmfw/Android.bp b/pvmfw/Android.bp
index 37d8ac9..6343183 100644
--- a/pvmfw/Android.bp
+++ b/pvmfw/Android.bp
@@ -13,7 +13,7 @@
     rustlibs: [
         "libaarch64_paging",
         "libbssl_avf_nostd",
-        "libbssl_ffi_nostd",
+        "libbssl_sys_nostd",
         "libciborium_nostd",
         "libciborium_io_nostd",
         "libcstr",