scripts/mkimg: shorten volume id of iso image

The volume id cannot be longer than 32 bytes so we need to shorten it a
bit

scripts/mkimg.base.sh

@@ -255,7 +255,7 @@ create_image_iso() {
 	if [ "$ARCH" = ppc64le ]; then
 		grub-mkrescue --output ${ISO} ${DESTDIR} -follow-links \
 			-sysid LINUX \
-			-volid "alpine-$PROFILE $RELEASE $ARCH"
+			-volid "alpine-${profile_abbrev:-$PROFILE} $RELEASE $ARCH"
 	else
 		xorrisofs \
 			-quiet \
@@ -264,7 +264,7 @@ create_image_iso() {
 			-joliet \
 			-rational-rock \
 			-sysid LINUX \
-			-volid "alpine-$PROFILE $RELEASE $ARCH" \
+			-volid "alpine-${profile_abbrev:-$PROFILE} $RELEASE $ARCH" \
 			$_isolinux \
 			$_efiboot \
 			-follow-links \

scripts/mkimg.standard.sh

@@ -4,6 +4,7 @@ profile_standard() {
 		Just enough to get you started.
 		Network connection is required."
 	profile_base
+	profile_abbrev="std"
 	image_ext="iso"
 	arch="x86 x86_64 ppc64le s390x"
 	output_format="iso"
@@ -18,10 +19,12 @@ profile_standard() {
 
 profile_extended() {
 	profile_standard
+	profile_abbrev="ext"
 	title="Extended"
 	desc="Most common used packages included.
 		Suitable for routers and servers.
 		Runs from RAM."
+	arch="x86 x86_64"
 	kernel_addons="dahdi-linux xtables-addons zfs spl"
 	apks="$apks
 		dahdi-linux dahdi-tools ethtool hwdata lftp links
@@ -58,10 +61,12 @@ profile_extended() {
 
 profile_virt() {
 	profile_standard
+	profile_abbrev="virt"
 	title="Virtual"
 	desc="Similar to standard.
 		Slimmed down kernel.
 		Optimized for virtual systems."
+	arch="x86 x86_64"
 	kernel_addons=
 	kernel_flavors="virt"
 	kernel_cmdline="console=tty0 console=ttyS0,115200"

scripts/mkimg.xen.sh

@@ -9,6 +9,7 @@ section_xen() {
 
 profile_xen() {
 	profile_standard
+	profile_abbrev="xen"
 	title="Xen"
 	desc="Build-in support for Xen Hypervisor.
 		Includes packages targed at Xen usage.