OSX 10.10: intercept memchr in libsystem_platform.dylib.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14734 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/shared/vg_replace_strmem.c b/shared/vg_replace_strmem.c
index db2fb9d..4ca652b 100644
--- a/shared/vg_replace_strmem.c
+++ b/shared/vg_replace_strmem.c
@@ -806,6 +806,7 @@
   MEMCHR(libsystemZuplatformZddylib, _platform_memchr)
 # endif
 # if DARWIN_VERS == DARWIN_10_10
+  MEMCHR(VG_Z_DYLD,                   memchr)
   /* _platform_memchr$VARIANT$Generic */
   MEMCHR(libsystemZuplatformZddylib, _platform_memchr$VARIANT$Generic)
 # endif