fix up ios.xsan builds
These used to work with custom/Homebrew Clang,
but I can only get them to link using Apple's now.
Change-Id: Ifa574207c693d147e074feb4166a8468e9402385
Reviewed-on: https://skia-review.googlesource.com/c/193543
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
diff --git a/build/ios.xsan b/build/ios.xsan
index 9f975d3..633d460 100644
--- a/build/ios.xsan
+++ b/build/ios.xsan
@@ -2,3 +2,6 @@
extra_cflags = -fsanitize=address,integer,undefined -fno-sanitize-recover=all
extra_ldflags = -fsanitize=address,integer,undefined
include build/ios
+
+cc = /usr/bin/clang
+cxx = /usr/bin/clang++
