Fix make buildbottest to not re-trigger a profile-opt build. issue28035.
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 4e6679a..58144f3 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -1011,7 +1011,7 @@
# Like testall, but with only one pass and without multiple processes.
# Run an optional script to include information about the build environment.
-buildbottest: all platform
+buildbottest: build_all platform
-@if which pybuildbot.identify >/dev/null 2>&1; then \
pybuildbot.identify "CC='$(CC)'" "CXX='$(CXX)'"; \
fi