[gentoo-user] /etc/portage/bashrc - patches

I'm trying to patch audacity-2.1.3-r1 (as it fails to compile) with the patch provided in Gentoo-Bug forum:
https://bugs.gentoo.org/show_bug.cgi?id=618326

I've edited the /etc/portage/bashrc:
https://wiki.gentoo.org/wiki//etc/portage/patches#Enabling_.2Fetc.2Fportage.2Fpatches_for_all_ebuilds

--- bashrc -----
# This hook is neccesary for automatic updating of the cfg-update index, please do not modify it!
pre_pkg_setup() {
        [[ $ROOT = / ]] && cfg-update --index
}

pre_src_prepare() {
    [[ ${EAPI:-0} == [012345] ]] || return
    if ! type estack_push > /dev/null 2>&1; then
        local estack_names="eshopts_push eshopts_pop evar_push evar_push_set evar_pop estack_push estack_pop"
        source <(awk "/^# @(FUNCTION|VARIABLE): / { p = 0 } /^# @(FUNCTION|VARIABLE): (${estack_names// /|})\$/ { p = 1 } p { print }" ${PORTDIR}/eclass/estack.eclas$
    fi
    if ! type epatch_user > /dev/null 2>&1; then
        local epatch_names="EPATCH_SOURCE EPATCH_USER_SOURCE epatch_user_death_notice epatch_user epatch"
        source <(awk "/^# @(FUNCTION|VARIABLE): / { p = 0 } /^# @(FUNCTION|VARIABLE): (${epatch_names// /|})\$/ { p = 1 } p { print }" ${PORTDIR}/eclass/epatch.eclas$
    fi

    epatch_user

    for name in $epatch_names; do
        unset $name
    done
    for name in $estack_names; do
        unset $name
    done

}
----- bashrc end --------

I've copied the patch "TrackPanel-Track-GetRate.patch"
to:  
/etc/portage/patches/media-sound/audacity-2.1.3-r1/

but emerge still fails.
What am I missing? 

collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:2005: audacity] Error 1
make[2]: Leaving directory '/var/tmp/portage/media-sound/audacity-2.1.3-r1/work/audacity-minsrc-2.1.3/src'
make[1]: *** [Makefile:1377: all] Error 2
make[1]: Leaving directory '/var/tmp/portage/media-sound/audacity-2.1.3-r1/work/audacity-minsrc-2.1.3/src'
make: *** [Makefile:795: all-recursive] Error 1
 * ERROR: media-sound/audacity-2.1.3-r1::gentoo failed (compile phase):
 *   emake failed

-- 
Thelma