Disable SkJumper on MSAN builds.

Change-Id: I89c944f5ed1e1a9aee5e73c384a53d86fd13d07e
Reviewed-on: https://skia-review.googlesource.com/8683
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>
diff --git a/BUILD.gn b/BUILD.gn
index a7787c3..9cef01f 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -29,7 +29,8 @@
   skia_enable_android_framework_defines = false
   skia_enable_discrete_gpu = true
   skia_enable_effects = true
-  skia_enable_jumper = is_skia_standalone && (is_linux || is_mac)
+  skia_enable_jumper =
+      is_skia_standalone && sanitize != "MSAN" && (is_linux || is_mac)
   skia_enable_gpu = true
   skia_enable_pdf = true
   skia_enable_tools = is_skia_standalone