bpo-29243: Fix Makefile with respect to --enable-optimizations (#1478)

* bpo-29243: Fix Makefile with respect to --enable-optimizations

When using the Profile Guided Optimization (./configure --enable-optimizations)
Python is built not only during `make` but rebuilt again during `make test`,
`make install` and others. This patch fixes the issue.

Note that this fix produces no change at all in the Makefile if configure is
run witout --enable-optimizations.

* !squash
diff --git a/Misc/ACKS b/Misc/ACKS
index fb62b5b..6f80ab7 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1120,6 +1120,7 @@
 Douglas Orr
 William Orr
 Michele Orrù
+Tomáš Orsava
 Oleg Oshmyan
 Denis S. Otkidach
 Peter Otten