perf: fix build for v5.5+

In kernel 5.5+ there are python3 scripts that explicitly use
/usr/bin/python3 as the interpreter. That will find the host
python and produce undefined results.

We add that interpreter path to our substitutions to ensure
that our sysroot variant is used.

(From OE-Core rev: 103316d50d4947b3c3500eb5cbc4845702a62d22)

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Change-Id: I3edfd9f105e350ca58bdfa09f905013f144798fd
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/poky/meta/recipes-kernel/perf/perf.bb b/poky/meta/recipes-kernel/perf/perf.bb
index 5f0ba7c..840f300 100644
--- a/poky/meta/recipes-kernel/perf/perf.bb
+++ b/poky/meta/recipes-kernel/perf/perf.bb
@@ -241,6 +241,7 @@
         sed -i 's,/usr/bin/python,/usr/bin/env python3,' "${s}"
         sed -i 's,/usr/bin/python2,/usr/bin/env python3,' "${s}"
         sed -i 's,/usr/bin/env python2,/usr/bin/env python3,' "${s}"
+        sed -i 's,/usr/bin/python3,/usr/bin/env python3,' "${s}"
     done
 
     # unistd.h can be out of sync between libc-headers and the captured version in the perf source