[roll third_party/pigweed] pw_cpu_exception_cortex_m: Add crash analysis API

Create a new API that analyzes the CPU state on an exception and
creates an analysis message. It delegates the storage and reporting of
the analysis as well as the crash to the user.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/204248
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https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 11777bcd3424150..27f4c88862d06f8
Roller-URL: https://ci.chromium.org/b/8746569157455855777
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Change-Id: I05782f2880768c571ebbae3c58f5840e055b4f3f
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/212093
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diff --git a/third_party/pigweed b/third_party/pigweed
index 11777bc..27f4c88 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 11777bcd3424150389786a1d56fde9586ac614fb
+Subproject commit 27f4c88862d06f8b8fc47c27212294dc2deb3918