Replace HAVE_MS_C_RUNTIME with _WIN32 in frameworks/base/tools.

Change-Id: Ideef62acbf53a442167c9b8038021affffef9e8a
diff --git a/tools/aidl/aidl_language.cpp b/tools/aidl/aidl_language.cpp
index cd6a3bd..5fab6c2 100644
--- a/tools/aidl/aidl_language.cpp
+++ b/tools/aidl/aidl_language.cpp
@@ -3,7 +3,7 @@
 #include <string.h>
 #include <stdlib.h>
 
-#ifdef HAVE_MS_C_RUNTIME
+#ifdef _WIN32
 int isatty(int  fd)
 {
     return (fd == 0);