Start moving 32-bit cruft somewhere it won't pollute 64-bit.

Change-Id: I03a6a50a5243f29e50fb58a3cf8b5e7198640baa
diff --git a/libc/Android.mk b/libc/Android.mk
index b77e394..0e45c0d 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -180,6 +180,7 @@
     bionic/fstatfs.c \
     bionic/__get_tls.cpp \
     bionic/lseek64.c \
+    bionic/ndk_cruft.cpp \
     bionic/statfs.c \
 
 endif