python-pip: follow 'python' alternatives groups scheme

- restore pip2 symlink into the python-pip package
- register 'pip3' alternatives group as well

srcpkgs/python-pip/template

@@ -1,7 +1,7 @@
 # Template file for 'python-pip'
 pkgname=python-pip
 version=8.1.1
-revision=2
+revision=3
 noarch=yes
 wrksrc="pip-${version}"
 build_style=python-module
@@ -15,19 +15,17 @@ homepage="https://pip.pypa.io/"
 license="MIT"
 distfiles="${PYPI_SITE}/p/pip/pip-${version}.tar.gz"
 checksum=3e78d3066aaeb633d185a57afdccf700aa2e660436b4af618bcb6ff0fa511798
-
-alternatives="
- pip:pip:/usr/bin/pip2.7
- pip:pip2:/usr/bin/pip2.7"
+alternatives="pip:pip:/usr/bin/pip2.7"
 
 post_install() {
+	ln -sf pip2.7 ${DESTDIR}/usr/bin/pip2
 	vlicense LICENSE.txt LICENSE
 }
 
 python3.4-pip_package() {
 	alternatives="
 	 pip:pip:/usr/bin/pip3.4
-	 pip:pip3:/usr/bin/pip3.4"
+	 pip3:pip3:/usr/bin/pip3.4"
 	noarch=yes
 	depends="python3.4-setuptools"
 	pycompile_version="3.4"