libdatadog update to 7b8cb2a7

Automated update by CI pipeline https://gitlab.ddbuild.io/DataDog/apm-reliability/dd-trace-php/-/pipelines/128439611

Full CI result: ❌ 2 job(s) failed

Author: github-actions[bot]

.gitlab/compile_extension.sh

@@ -19,10 +19,17 @@ if [ "${WITH_ASAN}" -eq "1" ]; then
   export ASAN=1
   export COMPILE_ASAN=1
 fi
-# Compile Rust and PHP in parallel
+# Compile Rust and PHP in parallel.
+# Wait on each pid individually: bare `wait` always returns 0, so a failing
+# cargo/make would be swallowed by `set -e` and only surface later as a
+# confusing "no such file or directory: target/debug/libdatadog_php.a" from the
+# link step, hiding the real compiler error.
 SHARED=1 ./compile_rust.sh &
+rust_pid=$!
 make -j static &
-wait
+make_pid=$!
+wait "${rust_pid}"
+wait "${make_pid}"
 
 # Link extension
 sed -i 's/-export-symbols .*\/datadog\.sym/-Wl,--retain-symbols-file=datadog.sym/g' ${EXTENSION_DIR}/ddtrace.ldflags