media-libs/flac: minor improvements

- added DOCS so changelog gets installed
- removed xz-utils as it's in @System
- added comment for bashism

Signed-off-by: Filip Kobierski <fkobi@pm.me>
Part-of: https://github.com/gentoo/gentoo/pull/41823
Closes: https://github.com/gentoo/gentoo/pull/41823
Signed-off-by: Sam James <sam@gentoo.org>

media-libs/flac/flac-1.5.0.ebuild

@@ -26,11 +26,12 @@ REQUIRED_USE="
 RDEPEND="ogg? ( media-libs/libogg[${MULTILIB_USEDEP}] )"
 DEPEND="${RDEPEND}"
 BDEPEND="
-	app-arch/xz-utils
 	sys-devel/gettext
 	virtual/pkgconfig
 "
 
+DOCS=( AUTHORS {CHANGELOG,README}.md )
+
 src_prepare() {
 	default
 	elibtoolize
@@ -62,6 +63,7 @@ multilib_src_configure() {
 	)
 
 	# bash for https://github.com/xiph/flac/pull/803
+	# should be fixed in >1.5.0
 	CONFIG_SHELL="${BROOT}"/bin/bash ECONF_SOURCE="${S}" econf "${myeconfargs[@]}"
 }