Import patches-unapplied version 2.531 to ubuntu/cosmic-proposed

Imported using git-ubuntu import.

Changelog parent: d9fe4558cf

New changelog entries:
  [ Daniel Watkins ]
  * ubuntu-cpc: Use linux-kvm for all amd64 minimized builds (LP: #1775472).
  [ Steve Langasek ]
  * live-build/ubuntu-cpc/hooks/033-disk-image-uefi.binary: don't manually
    install grub-efi-amd64 since that forces off grub-pc, which is otherwise
    now coinstallable.

debian/changelog

@@ -1,3 +1,15 @@
+livecd-rootfs (2.531) cosmic; urgency=medium
+
+  [ Daniel Watkins ]
+  * ubuntu-cpc: Use linux-kvm for all amd64 minimized builds (LP: #1775472).
+
+  [ Steve Langasek ]
+  * live-build/ubuntu-cpc/hooks/033-disk-image-uefi.binary: don't manually
+    install grub-efi-amd64 since that forces off grub-pc, which is otherwise
+    now coinstallable.
+
+ -- Steve Langasek <steve.langasek@ubuntu.com>  Wed, 06 Jun 2018 17:34:07 -0700
+
 livecd-rootfs (2.530) cosmic; urgency=medium
 
   * ubuntu-cpc: Reintroduce the -root.tar.xz artifact (LP: #1585233).

live-build/auto/config

@@ -600,16 +600,9 @@ case $PROJECT in
 		if [ "${SUBPROJECT:-}" = minimized ]; then
 			add_task install cloud-image
 			add_package install sudo
-			# linux-kvm currently only exists in xenial, not in
-			# non-LTS suites.  Fall back to virtual flavor, which
-			# may or may not boot initramfsless but enables us to
-			# test building and possibly build derivative images
-			# using other kernel flavors.
-			# If you enable an extra ppa, it is assumed that
-			# linux-kvm is available since you control the
-			# archive and can provide this metapackage as
-			# necessary.
-			if [ "$ARCH" = "amd64" ] && ([ -n "$EXTRA_PPAS" ] || [ "$SUITE" = xenial ] || [ "$SUITE" = bionic ]); then
+			# linux-kvm currently only exists for amd64, so fall back to the
+			# virtual flavour for other architectures
+			if [ "$ARCH" = "amd64" ]; then
 				KERNEL_FLAVOURS=kvm
 			else
 				KERNEL_FLAVOURS=virtual

live-build/ubuntu-cpc/hooks/033-disk-image-uefi.binary

@@ -88,7 +88,7 @@ install_grub() {
             efi_target=arm-efi
             ;;
         amd64)
-            chroot mountpoint apt-get install -qqy grub-efi-amd64-signed grub-efi-amd64 shim-signed
+            chroot mountpoint apt-get install -qqy grub-efi-amd64-signed shim-signed
             efi_target=x86_64-efi
             ;;
     esac