[third_party/pigweed] Roll 3 commits

36b6a7ddb0c28b6 pw_json: Classes for serializing JSON
1ac49bcda648d72 pw_software_update: Add java build objects
fc92d636edcc491 pw_toolchain: Add missing #include

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: a438bf7f3271870..36b6a7ddb0c28b6
Roller-URL: https://ci.chromium.org/b/8755526672731103217
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I8cf45cecc1ecde248bdf560d0561611e8567e346
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/193319
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index a438bf7..36b6a7d 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit a438bf7f3271870ff9e3a287590431bbfdc0ece2
+Subproject commit 36b6a7ddb0c28b66a6d3420b99104a5869f37363