x11-misc/xob: Set CC.

Makefile calls `$(CC)`, which seems to default to `cc`.

Closes: https://bugs.gentoo.org/785211
Signed-off-by: Ronny (tastytea) Gutbrod <gentoo@tastytea.de>

x11-misc/xob/xob-0.2.ebuild

@@ -1,8 +1,10 @@
-# Copyright 2020 Gentoo Authors
+# Copyright 2020-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
 
+inherit toolchain-funcs
+
 DESCRIPTION="A lightweight overlay volume (or anything) bar for the X Window System"
 HOMEPAGE="https://github.com/florentc/xob"
 SRC_URI="https://github.com/florentc/xob/archive/v${PV}.tar.gz -> ${P}.tar.gz"
@@ -17,6 +19,11 @@ RDEPEND="
 "
 DEPEND="${RDEPEND}"
 
+src_compile() {
+	tc-export CC
+	default
+}
+
 src_install() {
 	emake prefix="${EPREFIX}"/usr \
 		  sysconfdir="${EPREFIX}"/etc \