curl-config: only provide libraries with --libs

In line with the manpage, curl-config --libs should only provide the necessary
library flags for the linker in order to compile software with libcurl. Also
with this change, we match what the pkg-config file provides.

curl-config.in

@@ -142,9 +142,9 @@ while test $# -gt 0; do
 	   CURLLIBDIR=""
 	fi
 	if test "X@REQUIRE_LIB_DEPS@" = "Xyes"; then
-	  echo ${CURLLIBDIR}-lcurl @LDFLAGS@ @LIBCURL_LIBS@ @LIBS@
+	  echo ${CURLLIBDIR}-lcurl @LIBCURL_LIBS@ @LIBS@
 	else
-	  echo ${CURLLIBDIR}-lcurl @LDFLAGS@ @LIBS@
+	  echo ${CURLLIBDIR}-lcurl @LIBS@
 	fi
 	;;