Add *(.bss.*) to link.x; fixes #8

Const var, which is used for allocator, is .bss.alloc..., and because
there was no that pattern in link scrypt, FILE_END didn't count the var,
that's why initial zero value was overwritten by application name (see
MENUET01 header description for more info)

link.x

@@ -30,7 +30,10 @@ SECTIONS {
     *(data)
   }
 
-  .bss ALIGN(16) : {*(.bss)}
+  .bss ALIGN(16) : {
+    *(.bss)
+    *(.bss.*)
+  }
 
   FILE_END = .;
 }

src/nanolibc.rs

@@ -31,12 +31,3 @@ pub unsafe extern "C" fn memcmp(s1: *mut u8, s2: *const u8, n: usize) -> i32 {
 
     0
 }
-
-#[no_mangle]
-pub unsafe extern "C" fn strlen(str: *mut u8) -> usize {
-    let mut len = 0usize;
-    loop {
-        if *str.add(len) == 0 { return len; }
-        len += 1;
-    }
-}