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

chromeos-base/vboot_reference/vboot_reference-1.0.ebuild

Index: chromeos-base/vboot_reference/vboot_reference-1.0.ebuild
diff --git a/chromeos-base/vboot_reference/vboot_reference-1.0.ebuild b/chromeos-base/vboot_reference/vboot_reference-1.0.ebuild
index 5c28534bcf740ef4dc85adec52d31c476967df01..f7bffe95c6b89b53312ffc583dd2d269408b3aee 100644
--- a/chromeos-base/vboot_reference/vboot_reference-1.0.ebuild
+++ b/chromeos-base/vboot_reference/vboot_reference-1.0.ebuild
@@ -1,12 +1,12 @@
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Distributed under the terms of the GNU General Public License v2
 
-inherit eutils toolchain-funcs git
+inherit cros-workon
 
 DESCRIPTION="Chrome OS verified boot tools"
 LICENSE="GPL-3"
 SLOT="0"
-KEYWORDS="amd64 x86 arm"
+KEYWORDS="amd64 arm x86"
 IUSE="minimal"
 EAPI="2"
 
@@ -16,28 +16,18 @@ DEPEND="dev-libs/openssl
 EGIT_REPO_URI=git://chromiumos-git/git/repos/not-yet-populated.git
 SRCPATH=src/platform/vboot_reference
 
-src_unpack() {
-	if [ -z "${CHROMEOS_ROOT}" ] ; then
-		local CHROMEOS_ROOT=$(eval echo -n ~${SUDO_USER}/trunk)
-	fi
-        if [ -e "${CHROMEOS_ROOT}/${SRCPATH}" ] ; then
-		cp -a "${CHROMEOS_ROOT}/${SRCPATH}" "${S}" || die
-	else
-		git_src_unpack
-	fi
-}
-
-
 src_compile() {
 	tc-export CC AR CXX
-	emake || die "${SRCPATH} compile failed."
+	err_msg="${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="${D}/usr/bin" -C cgpt install || \
-	        	die "${SRCPATH} install failed."
-	else                 
+        	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