sys-apps/0xFFFF: Set CC.

The Makefile uses $CC and initializes it with `cc`.

Closes: https://bugs.gentoo.org/785157
Signed-off-by: Ronny (tastytea) Gutbrod <gentoo@tastytea.de>

sys-apps/0xFFFF/0xFFFF-0.8.ebuild

@@ -3,6 +3,8 @@
 
 EAPI=7
 
+inherit toolchain-funcs
+
 DESCRIPTION="The 0pen Free Fiasco Firmware Flasher"
 HOMEPAGE="https://github.com/pali/0xFFFF/"
 SRC_URI="https://github.com/pali/${PN}/releases/download/${PV}/${P}.tar.gz"
@@ -15,6 +17,11 @@ IUSE=""
 DEPEND="virtual/libusb:0"
 RDEPEND="${DEPEND}"
 
+src_compile() {
+	tc-export CC
+	default
+}
+
 src_install() {
 	emake DESTDIR="${ED}" PREFIX="/usr" install
 }