Bump buildroot to 2019.02

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

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+config BR2_PACKAGE_PYTHON_UVLOOP
+	bool "python-uvloop"
+	depends on BR2_PACKAGE_PYTHON3
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4 # libuv
+	depends on BR2_USE_MMU # libuv
+	depends on !BR2_STATIC_LIBS # libuv
+	depends on BR2_TOOLCHAIN_HAS_THREADS_NPTL # libuv
+	select BR2_PACKAGE_LIBUV
+	select BR2_PACKAGE_PYTHON3_SSL
+	help
+	  Fast implementation of asyncio event loop on top of libuv.
+
+	  http://github.com/MagicStack/uvloop
+
+comment "python-uvloop needs a toolchain w/ NPTL, dynamic library"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS_NPTL || BR2_STATIC_LIBS
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4
+	depends on BR2_USE_MMU

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

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+# md5, sha256 from https://pypi.org/pypi/uvloop/json
+md5	9584c5e372755f752e47c2ff8419efe1  uvloop-0.11.3.tar.gz
+sha256	fd5042d0a2ea07b92d0e2190f7711feb91cde31cf2bf1829e2e8c4c0fdd1f1aa  uvloop-0.11.3.tar.gz
+# Locally computed sha256 checksums
+sha256	2fdc436a67077941295c58647f521fbef8f50e46db0970552fa1a4dd8ae261c6  LICENSE-APACHE
+sha256	9185f3c77e9f6ef8859a6ba4c94128ac1329876be3e813aad32d7645e51ae409  LICENSE-MIT

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

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+################################################################################
+#
+# python-uvloop
+#
+################################################################################
+
+PYTHON_UVLOOP_VERSION = 0.11.3
+PYTHON_UVLOOP_SOURCE = uvloop-$(PYTHON_UVLOOP_VERSION).tar.gz
+PYTHON_UVLOOP_SITE = https://files.pythonhosted.org/packages/46/60/8e46188acba22369848d5e9bcbee3ca04b68a12d0598bd625c1a3994f5df
+PYTHON_UVLOOP_SETUP_TYPE = setuptools
+PYTHON_UVLOOP_LICENSE = Apache-2.0, MIT
+PYTHON_UVLOOP_LICENSE_FILES = LICENSE-APACHE LICENSE-MIT
+PYTHON_UVLOOP_BUILD_OPTS = build_ext --inplace --use-system-libuv
+PYTHON_UVLOOP_INSTALL_TARGET_OPTS = build_ext --inplace --use-system-libuv
+PYTHON_UVLOOP_DEPENDENCIES = libuv
+
+$(eval $(python-package))