build: prereq detect Python 3.10 for python3 binary

While the binary `python3.10` is correctly detected by the build system
the default `python3` binary is currently not detected if pointing to a
Python 3.10 installation.

Fix this by extending the grep regex.

Signed-off-by: Paul Spooren <mail@aparcar.org>
(cherry picked from commit 56ea2bf)

include/prereq-build.mk

@@ -159,7 +159,7 @@ $(eval $(call SetupHostCommand,python,Please install Python >= 3.5, \
 	python3.7 -V 2>&1 | grep 'Python 3', \
 	python3.6 -V 2>&1 | grep 'Python 3', \
 	python3.5 -V 2>&1 | grep 'Python 3', \
-	python3 -V 2>&1 | grep -E 'Python 3\.[5-9]\.?'))
+	python3 -V 2>&1 | grep -E 'Python 3\.([5-9]|10)\.?'))
 
 $(eval $(call SetupHostCommand,python3,Please install Python >= 3.5, \
 	python3.10 -V 2>&1 | grep 'Python 3', \
@@ -168,7 +168,7 @@ $(eval $(call SetupHostCommand,python3,Please install Python >= 3.5, \
 	python3.7 -V 2>&1 | grep 'Python 3', \
 	python3.6 -V 2>&1 | grep 'Python 3', \
 	python3.5 -V 2>&1 | grep 'Python 3', \
-	python3 -V 2>&1 | grep -E 'Python 3\.[5-9]\.?'))
+	python3 -V 2>&1 | grep -E 'Python 3\.([5-9]|10)\.?'))
 
 $(eval $(call TestHostCommand,python3-distutils, \
 	Please install the Python3 distutils module, \