Fix lint error.

src/platform-win32.cc

Index: src/platform-win32.cc
===================================================================
--- src/platform-win32.cc	(revision 2772)
+++ src/platform-win32.cc	(working copy)
@@ -1318,9 +1318,9 @@
 
 int OS::ActivationFrameAlignment() {
 #ifdef _WIN64
-  return 16;  // C math library requires the stack to be 16-byte aligned.
+  return 16;  // Windows 64-bit ABI requires the stack to be 16-byte aligned.
 #else
-  return 8;  // Floating-point math runs faster if stack is at least 8-byte aligned.
+  return 8;  // Floating-point math runs faster with 8-byte alignment.
 #endif
 }