Roll third_party/SwiftShader 481daed34f15..0bbf7ba9f909 (5 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/481daed34f15..0bbf7ba9f909

git log 481daed34f15..0bbf7ba9f909 --date=short --first-parent --format='%ad %ae %s'
2020-02-17 amaiorano@google.com Cache callstack results to avoid expensive lookup
2020-02-17 amaiorano@google.com Subzero: add REACTOR_EMIT_PRINT_LOCATION support
2020-02-17 bclayton@google.com third_party: Add shell script that updates marl.
2020-02-17 amaiorano@google.com Implement rr::Print support for Subzero
2020-02-17 amaiorano@google.com Subzero: fix another load from constant data

Created with:
  gclient setdep -r third_party/SwiftShader@0bbf7ba9f9

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/swiftshader-angle-autoroll
Please CC cwallez@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

Bug: None
Tbr: cwallez@google.com
Change-Id: I52277a2305d73e84211ad9b48a12b8275aa221b0
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2061126
Reviewed-by: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -182,7 +182,7 @@ deps = {
   },
 
   'third_party/SwiftShader': {
-    'url': '{swiftshader_git}/SwiftShader@481daed34f15a118d6897d719e70230117f19cfa',
+    'url': '{swiftshader_git}/SwiftShader@0bbf7ba9f909092f0328b1d519d5f7db1773be57',
     'condition': 'not build_with_chromium',
   },