rialto: Remove 'extern crate log'

Add liblog_rust_nostd into the list of rustlibs instead.

Test: m rialto
Change-Id: I12fa74771c50927bbd1a0c70ece43aa09b46cd05
diff --git a/rialto/Android.bp b/rialto/Android.bp
index cc71254..c2a19f3 100644
--- a/rialto/Android.bp
+++ b/rialto/Android.bp
@@ -11,6 +11,7 @@
     rustlibs: [
         "libaarch64_paging",
         "libbuddy_system_allocator",
+        "liblog_rust_nostd",
         "libvmbase",
     ],
     apex_available: ["com.android.virt"],
diff --git a/rialto/src/main.rs b/rialto/src/main.rs
index a769abb..bbe41c0 100644
--- a/rialto/src/main.rs
+++ b/rialto/src/main.rs
@@ -21,7 +21,6 @@
 mod exceptions;
 
 extern crate alloc;
-extern crate log;
 
 use aarch64_paging::{
     idmap::IdMap,