Bump buildroot to 2019.02

bsp/buildroot/package/python-sqlalchemy/Config.in

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+config BR2_PACKAGE_PYTHON_SQLALCHEMY
+	bool "python-sqlalchemy"
+	help
+	  SQLAlchemy is the Python SQL toolkit and Object Relational
+	  Mapper that gives application developers the full power and
+	  flexibility of SQL.
+
+	  It provides a full suite of well known enterprise-level
+	  persistence patterns, designed for efficient and
+	  high-performing database access, adapted into a simple and
+	  Pythonic domain language.
+
+	  http://www.sqlalchemy.org

bsp/buildroot/package/python-sqlalchemy/python-sqlalchemy.hash

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+# md5 from https://pypi.python.org/pypi/SQLAlchemy/json, sha256 locally computed
+md5    968e07dc0aa92f9205bb3877f33f498f  SQLAlchemy-1.2.2.tar.gz
+sha256 64b4720f0a8e033db0154d3824f5bf677cf2797e11d44743cf0aebd2a0499d9d  SQLAlchemy-1.2.2.tar.gz
+sha256 73bda3d7d6c568f494c1d12520a97d41a38b7ce91d88c21f1b469b747b17f7fd  LICENSE

bsp/buildroot/package/python-sqlalchemy/python-sqlalchemy.mk

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+################################################################################
+#
+# python-sqlalchemy
+#
+################################################################################
+
+PYTHON_SQLALCHEMY_VERSION = 1.2.2
+PYTHON_SQLALCHEMY_SOURCE = SQLAlchemy-$(PYTHON_SQLALCHEMY_VERSION).tar.gz
+PYTHON_SQLALCHEMY_SITE = https://pypi.python.org/packages/b9/fb/a56d2fc0ce3571328fa872734ad124cae25a4cea422088987f865fb71787
+PYTHON_SQLALCHEMY_SETUP_TYPE = setuptools
+PYTHON_SQLALCHEMY_LICENSE = MIT
+PYTHON_SQLALCHEMY_LICENSE_FILES = LICENSE
+
+$(eval $(python-package))