[PATCH] fix compilation when libc does not define __GLIBC__

libexfat would only compile on Linux with __GLIBC__ defined. Changed
to use __linux__ which likely better fits the original intent.

Signed-off-by: Brendan Heading <brendanheading@gmail.com>
---
 platform.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: libexfat/libexfat/platform.h
===================================================================
--- libexfat/libexfat/platform.h	(revision 422)
+++ libexfat/libexfat/platform.h	(working copy)
@@ -24,7 +24,7 @@
 #ifndef PLATFORM_H_INCLUDED
 #define PLATFORM_H_INCLUDED
 
-#if defined(__GLIBC__)
+#if defined(__linux__)
 
 #include <endian.h>
 #include <byteswap.h>