runtime: clean up / align comment tabbing

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13336046

src/pkg/runtime/runtime.h

@@ -328,7 +328,7 @@ struct	M
 	uint32	stackcachecnt;
 	void*	stackcache[StackCacheSize];
 	G*	lockedg;
-	uintptr	createstack[32];	// Stack that created this thread.
+	uintptr	createstack[32];// Stack that created this thread.
 	uint32	freglo[16];	// D[i] lsb and F[i]
 	uint32	freghi[16];	// D[i] msb and F[i+16]
 	uint32	fflag;		// floating point compare flags
@@ -431,7 +431,7 @@ enum
 struct	Func
 {
 	uintptr	entry;	// start pc
-	int32	nameoff;	// function name
+	int32	nameoff;// function name
 	
 	// TODO: Perhaps remove these fields.
 	int32	args;	// in/out args size