dev-lang/spidermonkey:60 set both SHELL and CONFIG_SHELL to bash

Ensure the requirement of bash for shell is satisfied in the environment
and build system once and for all.

Closes: https://bugs.gentoo.org/666732
Signed-off-by: Ian Stakenvicius <axs@gentoo.org>
Package-Manager: Portage-2.3.62, Repoman-2.3.11

dev-lang/spidermonkey/spidermonkey-60.5.2_p0-r2.ebuild

@@ -41,6 +41,7 @@ pkg_pretend() {
 pkg_setup(){
 	[[ ${MERGE_TYPE} == "binary" ]] || \
 		moz_pkgsetup
+	export SHELL="${EPREFIX}/bin/bash"
 }
 
 src_prepare() {