community/kconfig5: modernize variables

community/kconfig5/APKBUILD

@@ -36,11 +36,14 @@ build() {
 }
 
 check() {
-	mkdir "$srcdir"/home
-	chmod 0700 "$srcdir"/home
-	export XDG_RUNTIME_DIR="$srcdir"/home
-	HOME="$srcdir"/home xvfb-run ctest --test-dir build --output-on-failure -E 'kconfig(core-(kconfigtest|kdesktopfiletest|test_kconf_update)|gui-kstandardshortcutwatchertest)'
-	rm -fr "$srcdir"/home
+	local _home="${srcdir:?}"/home
+	mkdir "$_home"
+	chmod 0700 "$_home"
+	XDG_RUNTIME_DIR="$_home" \
+		HOME="$_home" \
+		xvfb-run ctest --test-dir build --output-on-failure \
+		-E 'kconfig(core-(kconfigtest|kdesktopfiletest|test_kconf_update)|gui-kstandardshortcutwatchertest)'
+	rm -fr "$_home"
 }
 
 package() {