typo


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2174 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/coregrind/arch/Makefile.am b/coregrind/arch/Makefile.am
index 629a038..c0eeaea 100644
--- a/coregrind/arch/Makefile.am
+++ b/coregrind/arch/Makefile.am
@@ -1,2 +1,2 @@
 
-SUBDIR=$(VG_PLATFORM)
+SUBDIRS=$(VG_PLATFORM)