python3-pip: update to 21.1.

Install entrypoint script as `pip3` and make `pip` a symlink.

Closes #30075.

srcpkgs/python3-pip/patches/no-versioned-pip.patch

@@ -1,13 +1,11 @@
---- setup.py.orig	2021-01-30 17:47:39.874134606 -0500
-+++ setup.py	2021-01-30 17:47:54.435139352 -0500
-@@ -74,10 +74,6 @@
-     entry_points={
-         "console_scripts": [
-             "pip=pip._internal.cli.main:main",
--            "pip{}=pip._internal.cli.main:main".format(sys.version_info[0]),
--            "pip{}.{}=pip._internal.cli.main:main".format(
--                *sys.version_info[:2]
--            ),
-         ],
-     },
- 
+--- setup.py
++++ setup.py
+@@ -70,8 +70,6 @@
+     entry_points={
+         "console_scripts": [
+-            "pip=pip._internal.cli.main:main",
+             "pip{}=pip._internal.cli.main:main".format(sys.version_info[0]),
+-            "pip{}.{}=pip._internal.cli.main:main".format(*sys.version_info[:2]),
+         ],
+     },
+     zip_safe=False,

srcpkgs/python3-pip/template

@@ -1,6 +1,6 @@
 # Template file for 'python3-pip'
 pkgname=python3-pip
-version=21.0.1
+version=21.1
 revision=1
 wrksrc="pip-${version}"
 build_style=python3-module
@@ -12,12 +12,11 @@ license="MIT"
 homepage="https://pip.pypa.io/"
 changelog="https://raw.githubusercontent.com/pypa/pip/master/NEWS.rst"
 distfiles="${PYPI_SITE}/p/pip/pip-${version}.tar.gz"
-checksum=99bbde183ec5ec037318e774b0d8ae0a64352fe53b2c7fd630be1d07e94f41e5
-
-do_check() {
-	: tests have unpackaged dependencies
-}
+checksum=a810bf07c3723a28621c29abe8e34429fa082c337f89aea9a795865416b66d3e
+# Tests have unpackaged dependencies
+make_check=no
 
 post_install() {
 	vlicense LICENSE.txt
+	ln -s pip3 "${DESTDIR}/usr/bin/pip"
 }