Update yasm .gyp for tweaked ASAN bots.

They're not passing -fsanitize=address anymore, rather
-fsanitize=address,bool,etc,etc,etc...

NOTREECHECKS=true

BUG=skia:

Review URL: https://codereview.chromium.org/1269383002

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' ],
+    'ldflags!': [ '-stdlib=libc++', '-fsanitize=address,bool,integer-divide-by-zero,null,object-size,return,nonnull-attribute,returns-nonnull-attribute,unreachable,vla-bound' ],
     # https://crbug.com/489901
-    'cflags!': [ '-fsanitize=bounds', '-fsanitize=address' ],
+    'cflags!': [ '-fsanitize=bounds', '-fsanitize=address,bool,integer-divide-by-zero,null,object-size,return,nonnull-attribute,returns-nonnull-attribute,unreachable,vla-bound' ],
     'libraries!': [ '-llog', ],
   },
   'targets': [