Bump buildroot to 2019.02

bsp/buildroot/package/libgit2/Config.in

@@ -0,0 +1,9 @@
+config BR2_PACKAGE_LIBGIT2
+	bool "libgit2"
+	select BR2_PACKAGE_ZLIB
+	help
+	  libgit2 is a portable, pure C implementation of the Git core
+	  methods provided as a linkable library with a solid API,
+	  allowing to build Git functionality into your application.
+
+	  https://github.com/libgit2/libgit2

bsp/buildroot/package/libgit2/libgit2.hash

@@ -0,0 +1,3 @@
+# Locally calculated
+sha256	0b7ca31cb959ff1b22afa0da8621782afe61f99242bf716c403802ffbdb21d51  libgit2-v0.27.4.tar.gz
+sha256	d9a8038088df84fde493fa33a0f1e537252eeb9642122aa4b862690197152813  COPYING

bsp/buildroot/package/libgit2/libgit2.mk

@@ -0,0 +1,51 @@
+################################################################################
+#
+# libgit2
+#
+################################################################################
+
+LIBGIT2_VERSION = v0.27.4
+LIBGIT2_SITE = $(call github,libgit2,libgit2,$(LIBGIT2_VERSION))
+LIBGIT2_LICENSE = GPL-2.0 with linking exception
+LIBGIT2_LICENSE_FILES = COPYING
+LIBGIT2_INSTALL_STAGING = YES
+
+LIBGIT2_CONF_OPTS = \
+	-DUSE_GSSAPI=OFF \
+	-DBUILD_CLAR=OFF \
+	-DUSE_ICONV=ON \
+	-DTHREADSAFE=$(if $(BR2_TOOLCHAIN_HAS_THREADS),ON,OFF)
+
+LIBGIT2_DEPENDENCIES = zlib
+
+# If libiconv is available (for !locale toolchains), then we can use
+# it for iconv support. Note that USE_ICONV=ON is still correct even
+# without libiconv because (1) most toolchain have iconv support
+# without libiconv and (2) even if USE_ICONV=ON but iconv support is
+# not available, libgit2 simply avoids using iconv.
+ifeq ($(BR2_PACKAGE_LIBICONV),y)
+LIBGIT2_DEPENDENCIES += libiconv
+endif
+
+ifeq ($(BR2_PACKAGE_LIBSSH2),y)
+LIBGIT2_DEPENDENCIES += libssh2
+LIBGIT2_CONF_OPTS += -DUSE_SSH=ON
+else
+LIBGIT2_CONF_OPTS += -DUSE_SSH=OFF
+endif
+
+ifeq ($(BR2_PACKAGE_OPENSSL),y)
+LIBGIT2_DEPENDENCIES += openssl
+LIBGIT2_CONF_OPTS += -DUSE_HTTPS=OpenSSL
+else
+LIBGIT2_CONF_OPTS += -DUSE_HTTPS=OFF
+endif
+
+ifeq ($(BR2_PACKAGE_LIBCURL),y)
+LIBGIT2_DEPENDENCIES += libcurl
+LIBGIT2_CONF_OPTS += -DCURL=ON
+else
+LIBGIT2_CONF_OPTS += -DCURL=OFF
+endif
+
+$(eval $(cmake-package))