[virt] Adjust spelling of initialise in code and comments

This cl updates the spelling of "initialise" to "initialize" in
the code and comments.

Test: m com.android.virt pvmfw_img
Change-Id: If0ce2a3e8188ddabd4d4e24912eb4973942bd550
diff --git a/vmbase/src/layout/mod.rs b/vmbase/src/layout/mod.rs
index 21c113a..f67e518 100644
--- a/vmbase/src/layout/mod.rs
+++ b/vmbase/src/layout/mod.rs
@@ -62,7 +62,7 @@
     linker_region!(data_begin, data_end)
 }
 
-/// Zero-initialised writable data.
+/// Zero-initialized writable data.
 pub fn bss_range() -> Range<usize> {
     linker_region!(bss_begin, bss_end)
 }