libmpc: bootstrap=yes; fix bootstrap build.

srcpkgs/libmpc/template

@@ -2,6 +2,7 @@
 pkgname=libmpc
 version=1.0.2
 revision=1
+bootstrap=yes
 wrksrc="mpc-${version}"
 build_style=gnu-configure
 configure_args="EGREP=egrep"
@@ -14,6 +15,11 @@ license="LGPL-3"
 distfiles="http://www.multiprecision.org/mpc/download/mpc-${version}.tar.gz"
 checksum=b561f54d8a479cee3bc891ee52735f18ff86712ba30f036f8b8537bae380c488
 
+if [ -z "$CHROOT_READY" ]; then
+	CFLAGS="-I${XBPS_MASTERDIR}/usr/include"
+	LDFLAGS="-L${XBPS_MASTERDIR}/usr/lib"
+fi
+
 post_install() {
 	mv ${DESTDIR}/usr/share/info/{mpc,libmpc}.info
 }