python,python3: add python-pip-conf package to be used by both python-pip & python3-pip

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

lang/python/Makefile

@@ -59,6 +59,16 @@ define Package/python/Default/description
  the development of higher quality, more maintainable code.
 endef
 
+define Package/python-pip-conf
+$(call Package/python/Default)
+  TITLE:=Configuration file for pip/pip3
+  URL:=https://pip.pypa.io
+endef
+
+define Package/python-pip-conf/description
+ Configuration file for pip/pip3
+endef
+
 define Package/python-base
 $(call Package/python/Default)
   TITLE:=Python $(PYTHON_VERSION) interpreter
@@ -257,6 +267,11 @@ define PyPackage/python/filespec
 -|$(PYTHON_PKG_DIR)
 endef
 
+define Package/python-pip-conf/install
+	$(INSTALL_DIR) $(1)/etc
+	$(CP) ./files/pip.conf $(1)/etc
+endef
+
 HOST_LDFLAGS += \
 	$$$$(pkg-config --static --libs libcrypto libssl)
 
@@ -288,6 +303,8 @@ $(eval $(call PyPackage,python-base))
 $(eval $(call PyPackage,python-light))
 $(eval $(call PyPackage,python))
 
+$(eval $(call BuildPackage,python-pip-conf))
+
 $(eval $(call BuildPackage,python-base))
 $(eval $(call BuildPackage,python-light))
 $(eval $(call BuildPackage,python))

lang/python/files/pip.conf

@@ -0,0 +1,3 @@
+[global]
+cache-dir=/tmp/.cache
+log-file=/tmp/pip-log.txt

lang/python/files/python-package-pip.mk

@@ -8,7 +8,7 @@
 define Package/python-pip
 $(call Package/python/Default)
   TITLE:=Python $(PYTHON_VERSION) pip module
-  DEPENDS:=+python +python-setuptools
+  DEPENDS:=+python +python-setuptools +python-pip-conf
 endef
 
 define PyPackage/python-pip/install