di: multiple cleanups.

- Override CC and CFLAGS to allow cross compilation.
- No need to use vman, di.1 is installed by the software Makefile.

Close #695 #712

srcpkgs/di/template

@@ -10,11 +10,10 @@ distfiles="http://www.gentoo.com/di/${pkgname}-${version}.tar.gz"
 checksum=2cdfface7a85e3a359cb228277b090a0648cabe18520e43b09919bdaf67b71d2
 
 do_build() {
-	make
+	make CC=$CC CFLAGS="$CFLAGS"
 }
 
 do_install() {
 	make INSTALL_DIR="${DESTDIR}/usr" install
-	vman di.1
 	vlicense LICENSE
 }