ksupport: expose bcmp to compiled kernel

src/libksupport/src/kernel/api.rs

@@ -230,6 +230,12 @@ pub fn resolve(required: &[u8]) -> Option<u32> {
         api!(__aeabi_memclr),
 
         // libc
+        api!(
+            bcmp,
+            extern "C" {
+                fn bcmp(s1: *const u8, s2: *const u8, n: usize) -> i32;
+            }
+        ),
         api!(
             memcpy,
             extern "C" {