[superproject] Roll third_party/pigweed pw_string: Reenable insert, erase tests
This CL re-enables tests for insert and erase that were disabled while
debugging CQ failures in pwrev/148333.
These tests push the qemu_gcc version of string_test over the same flash
size threshold that the qemu_clang version crossed some months ago. In
particular, the qemu_gcc_debug version no longer fits into lm3s6965evb's
flash size of 255 KiB. The qemu_clang workaround of only building the
"size_optimized" version of string_test for that target has been applied
to qemu_gcc as well.
Presubmit-Verified: CQ Bot Account <email@example.com>
diff --git a/third_party/pigweed/src b/third_party/pigweed/src
index ce3e128..7c87569 160000
@@ -1 +1 @@
-Subproject commit ce3e1280fcac0461258874eea3e917f6b30be573
+Subproject commit 7c875693d478ac0da2f358a1542a4fc1cad1b60d