add libcurl build recipe

for static linking

depends/packages/libcurl.mk

@@ -0,0 +1,23 @@
+package=libcurl
+$(package)_version=7.54.0
+$(package)_download_path=https://curl.haxx.se/download
+$(package)_file_name=curl-$($(package)_version).tar.gz
+$(package)_sha256_hash=a84b635941c74e26cce69dd817489bec687eb1f230e7d1897fc5b5f108b59adf
+$(package)_config_opts=--disable-shared --enable-static --prefix=$(host_prefix)
+$(package)_cflags=
+$(package)_conf_tool=./configure
+
+define $(package)_set_vars
+endef
+
+define $(package)_config_cmds
+  $($(package)_conf_tool) $($(package)_config_opts)
+endef
+
+define $(package)_build_cmds
+  $(MAKE)
+endef
+
+define $(package)_stage_cmds
+  $(MAKE) DESTDIR=$($(package)_staging_dir) install
+endef