[FS#201] lantiq: polarssl-cyassl package conflict

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - juanriccio (juanriccio) 

Attached to Project - LEDE Project
Summary - lantiq: polarssl-cyassl package conflict 
Task Type - Build Failure
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - I'm attaching my .config file for easier reproduction.
I wish there was an easy way to choose either polarssl or cyassl and only use/link one of the two. As is is now, it appears I have to use both.

Collected errors:
 * check_data_file_clashes: Package libustream-polarssl wants to install file /lede-source/build_dir/target-mips_24kc_musl-1.1.15/root-lantiq/lib/libustream-ssl.so
	But that file is already provided by package  * libustream-cyassl
 * opkg_install_cmd: Cannot install package libustream-polarssl.
 * check_data_file_clashes: Package busybox wants to install file /lede-source/build_dir/target-mips_24kc_musl-1.1.15/root-lantiq/usr/bin/traceroute6
	But that file is already provided by package  * iputils-traceroute6
 * opkg_install_cmd: Cannot install package busybox.
 * check_data_file_clashes: Package libustream-polarssl wants to install file /lede-source/build_dir/target-mips_24kc_musl-1.1.15/root-lantiq/lib/libustream-ssl.so
	But that file is already provided by package  * libustream-cyassl
 * opkg_install_cmd: Cannot install package luci-ssl.
make[2]: *** [package/install] Error 255
make[2]: Leaving directory `/lede-source'
make[1]: *** [/lede-source/staging_dir/target-mips_24kc_musl-1.1.15/stamp/.package_install] Error 2
make[1]: Leaving directory `/lede-source'
make: *** [world] Error 2

One or more files have been attached.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=201