cmd/ld: s/specificaly/specifically/ in comment

Change-Id: I849b8046daaec97ae631d59f1870cd5f1cd72f22
Reviewed-on: https://go-review.googlesource.com/3176Reviewed-by: Minux Ma <minux@golang.org>

src/cmd/ld/decodesym.c

@@ -7,7 +7,7 @@
 #include	"../../runtime/typekind.h"
 
 // Decoding the type.* symbols.	 This has to be in sync with
-// ../../runtime/type.go, or more specificaly, with what
+// ../../runtime/type.go, or more specifically, with what
 // ../gc/reflect.c stuffs in these.
 
 static Reloc*