simplify the way we disable sanitizers for yasm

gyp/yasm.gyp

Index: gyp/yasm.gyp
diff --git a/gyp/yasm.gyp b/gyp/yasm.gyp
index aeca9c05fbf200a1db764d68c797207413634f77..de1d1dc1b7b5113d89902aaf19283a9ed0a485e6 100644
--- a/gyp/yasm.gyp
+++ b/gyp/yasm.gyp
@@ -62,9 +62,9 @@
   },
   'target_defaults': {
     # Silence warnings in libc++ builds (C code doesn't need this flag).
-    'ldflags!': [ '-stdlib=libc++', '-fsanitize=address,bool,integer-divide-by-zero,null,object-size,return,nonnull-attribute,returns-nonnull-attribute,signed-integer-overflow,unreachable,vla-bound' ],
+    'ldflags!': [ '-stdlib=libc++', '-fsanitize=<(skia_sanitizer)' ],
     # https://crbug.com/489901
-    'cflags!': [ '-fsanitize=bounds', '-fsanitize=address,bool,integer-divide-by-zero,null,object-size,return,nonnull-attribute,returns-nonnull-attribute,signed-integer-overflow,unreachable,vla-bound' ],
+    'cflags!': [ '-fsanitize=bounds', '-fsanitize=<(skia_sanitizer)' ],
     'libraries!': [ '-llog', ],
   },
   'targets': [