Undefine the t64 flags in communicate.h, per the comment above this section,
and the fact that the time64 wrappers live in a separate compilation unit
which gets the t64 flags set forcefully.

This fixes compilation on the 32bit ARM archs.

Index: fakeroot/communicate.h
===================================================================
--- fakeroot.orig/communicate.h
+++ fakeroot/communicate.h
@@ -39,6 +39,8 @@
 #ifndef _LARGEFILE_SOURCE
 # define _LARGEFILE_SOURCE
 #endif
+#undef _FILE_OFFSET_BITS
+#undef _TIME_BITS
 
 /* Then include features.h, to find out what glibc we run */
 #ifdef HAVE_FEATURES_H
