Fix make buildbottest to not re-trigger a profile-opt build. issue28035.
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 07d2350..139a211 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -883,7 +883,7 @@
# Like testall, but with a single pass only
# run an optional script to include some 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