Prepare vboot_reference ebuild to work with the new makefile and build flow.

chromeos-base/vboot_reference/vboot_reference-9999.ebuild

+# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+# Distributed under the terms of the GNU General Public License v2
+
+inherit cros-workon
+
+DESCRIPTION="Chrome OS verified boot tools"
+LICENSE="GPL-3"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~x86"
+IUSE="minimal"
+EAPI="2"
+
+DEPEND="dev-libs/openssl
+        sys-apps/util-linux"
+
+EGIT_REPO_URI=git://chromiumos-git/git/repos/not-yet-populated.git
+SRCPATH=src/platform/vboot_reference
+
+src_compile() {
+        tc-export CC AR CXX
+        err_msg="${SRCPATH} compile failed. "
+        err_msg+="Try running 'make clean' in the package root directory"
+        emake || die "${err_msg}"
+}
+
+src_install() {
+        if use minimal ; then
+                emake DESTDIR="${D}/usr/bin" BUILD="${S}"/build -C cgpt \
+                      install || die "${SRCPATH} install failed."
+        else
+                emake DESTDIR="${D}/usr/bin" install || \
+                        die "${SRCPATH} install failed."
+        fi
+}