Add better linux support by using the right macro.  This still should be
autoconfiscated, but for now this is sufficient.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3701 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/Support/DataTypes.h b/include/Support/DataTypes.h
index b461351..b1b8879 100644
--- a/include/Support/DataTypes.h
+++ b/include/Support/DataTypes.h
@@ -21,7 +21,7 @@
 
 #include <inttypes.h>
 
-#ifdef LINUX
+#ifdef __linux__
 #define __STDC_LIMIT_MACROS 1
 #include <stdint.h>       // Defined by ISO C 99
 #include <endian.h>