gh-101525: Fix make test if the --enable-bolt enabled

[corona10]

The make test failed without this change due to the already BOLTed binary.
Skip the BOLTrized process if the binary is already BOLTed.

$ make test
Rebuilding with profile guided optimizations:
rm -f profile-clean-stamp
make build_all CFLAGS_NODIST=" -fprofile-use -fprofile-correction" LDFLAGS_NODIST=""
make[1]: Entering directory '/home1/corona10/cpython'
./python -E -S -m sysconfig --generate-posix-vars ;\
if test $? -ne 0 ; then \
        echo "generate-posix-vars failed" ; \
        rm -f ./pybuilddir.txt ; \
        exit 1 ; \
fi
./python -E -c 'import sys ; from sysconfig import get_platform ; print("%s-%d.%d" % (get_platform(), *sys.version_info[:2]))' >platform
The necessary bits to build these optional modules were not found:
nis
To find the necessary bits, look in configure.ac and config.log.

Checked 111 modules (30 built-in, 79 shared, 1 n/a on linux-x86_64, 0 disabled, 1 missing, 0 failed on import)
make[1]: Leaving directory '/home1/corona10/cpython'
rm -f *.fdata
/usr/local/bin/llvm-bolt ./python -instrument -instrumentation-file-append-pid -instrumentation-file=/home1/corona10/cpython/python.bolt -o python.bolt_inst
BOLT-INFO: Target architecture: x86_64
BOLT-INFO: BOLT version: 712dfec1781db8aa92782b98cac5517db548b7f9
/usr/local/bin/llvm-bolt: './python': BOLT-ERROR: input file was processed by BOLT. Cannot re-optimize.
make: *** [Makefile:827: bolt-opt] Error 1

I used the recommended approach to detect the BOLTed binary from the BOLT team.
llvm/llvm-project#60253

• Issue: Make BOLT as stable feature #101525

[erlend-aasland]

AC changes look good to me. For the Makefile changes, I trust you know what you are doing, because I don't :)

[corona10]

AC changes look good to me. For the Makefile changes, I trust you know what you are doing, because I don't :)

Look like I got approval from the Erlend at SLC :)