[openwrt/openwrt] build: drop support for python 3.6

[LEDE Commits]

ynezz pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/7d0fb2cc34cb7aaa2b6eaca4f14f2c20778d3e40

commit 7d0fb2cc34cb7aaa2b6eaca4f14f2c20778d3e40
Author: Doug Kerr <dek3rr at gmail.com>
AuthorDate: Thu Sep 8 19:07:18 2022 -0400

    build: drop support for python 3.6
    
    python 3.6 EOL was Dec. 2021
    buildbot is running debian 10 which ships with 3.7
    meson 0.62+ requires 3.7
    
    Signed-off-by: Doug Kerr <dek3rr at gmail.com>
    Signed-off-by: Petr Štetiar <ynezz at true.cz> [rebased]
---
 README.md               |  2 +-
 include/prereq-build.mk | 10 ++++------
 2 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index 29ff89f90c..8bca0ee7b0 100644
--- a/README.md
+++ b/README.md
@@ -44,7 +44,7 @@ documentation.
 
 ```
 binutils bzip2 diff find flex gawk gcc-6+ getopt grep install libc-dev libz-dev
-make4.1+ perl python3.6+ rsync subversion unzip which
+make4.1+ perl python3.7+ rsync subversion unzip which
 ```
 
 ### Quickstart
diff --git a/include/prereq-build.mk b/include/prereq-build.mk
index 52988fbda9..9096e379bb 100644
--- a/include/prereq-build.mk
+++ b/include/prereq-build.mk
@@ -175,23 +175,21 @@ $(eval $(call SetupHostCommand,install,Please install GNU 'install', \
 $(eval $(call SetupHostCommand,perl,Please install Perl 5.x, \
 	perl --version | grep "perl.*v5"))
 
-$(eval $(call SetupHostCommand,python,Please install Python >= 3.6, \
+$(eval $(call SetupHostCommand,python,Please install Python >= 3.7, \
 	python3.11 -V 2>&1 | grep 'Python 3', \
 	python3.10 -V 2>&1 | grep 'Python 3', \
 	python3.9 -V 2>&1 | grep 'Python 3', \
 	python3.8 -V 2>&1 | grep 'Python 3', \
 	python3.7 -V 2>&1 | grep 'Python 3', \
-	python3.6 -V 2>&1 | grep 'Python 3', \
-	python3 -V 2>&1 | grep -E 'Python 3\.([6-9]|[0-9][0-9])\.?'))
+	python3 -V 2>&1 | grep -E 'Python 3\.([7-9]|[0-9][0-9])\.?'))
 
-$(eval $(call SetupHostCommand,python3,Please install Python >= 3.6, \
+$(eval $(call SetupHostCommand,python3,Please install Python >= 3.7, \
 	python3.11 -V 2>&1 | grep 'Python 3', \
 	python3.10 -V 2>&1 | grep 'Python 3', \
 	python3.9 -V 2>&1 | grep 'Python 3', \
 	python3.8 -V 2>&1 | grep 'Python 3', \
 	python3.7 -V 2>&1 | grep 'Python 3', \
-	python3.6 -V 2>&1 | grep 'Python 3', \
-	python3 -V 2>&1 | grep -E 'Python 3\.([6-9]|[0-9][0-9])\.?'))
+	python3 -V 2>&1 | grep -E 'Python 3\.([7-9]|[0-9][0-9])\.?'))
 
 $(eval $(call TestHostCommand,python3-distutils, \
 	Please install the Python3 distutils module, \