curl: cleanup buildpaths from curl-config

curl-config will be installed to target, cleanup buildpaths in it:

* remove ${STAGING_DIR_HOST} from CC, CFLAGS ...

(From OE-Core rev: 3e4978a534afc7fd4b82a044da8d9774cf09a4f0)

Signed-off-by: Wenzong Fan <wenzong.fan@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/curl/curl_7.44.0.bb

@@ -45,6 +45,11 @@ do_install_append() {
 	oe_multilib_header curl/curlbuild.h
 }
 
+do_install_append_class-target() {
+	# cleanup buildpaths from curl-config
+	sed -i -e 's,${STAGING_DIR_HOST},,g' ${D}${bindir}/curl-config
+}
+
 PACKAGES =+ "lib${BPN}"
 
 FILES_lib${BPN} = "${libdir}/lib*.so.*"