[PATCH kernel-helper] proxmox-boot: add memtest86 as entry to systemd-boot

[Stoiko Ivanov <s.ivanov@proxmox.com>]

memtest86+ ships a config-snippet for grub configuration, and is thus
present on installations using grub (although currently not functional
when secure-boot is enabled).

adding an equivalent entry for memtest86+ on systemd-booted systems
seems like an improvment and a step to having similar functionality in
our different boot-loader setups.

Tested by installing proxmox-kernel-helper with this patch and running
proxmox-boot-tool reinit, followed by rebooting into memtest86+ on a
systemd-booted system.

Suggested-by: Daniel Herzig <d.herzig@proxmox.com>
Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
---
not 100% sure if it's worth adding, but both Daniel and I thought this might
exist and I remember missing it once on a host of mine

 src/bin/proxmox-boot-tool | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/bin/proxmox-boot-tool b/src/bin/proxmox-boot-tool
index 95d699d..b785c7d 100755
--- a/src/bin/proxmox-boot-tool
+++ b/src/bin/proxmox-boot-tool
@@ -196,6 +196,17 @@ init_bootloader() {
 			echo "timeout 3" > "$esp_mp/$PMX_LOADER_CONF.tmp"
 			echo "default proxmox-*" >> "$esp_mp/$PMX_LOADER_CONF.tmp"
 			mv "$esp_mp/$PMX_LOADER_CONF.tmp" "$esp_mp/$PMX_LOADER_CONF"
+			memtest=memtest86+x64.efi
+			memtest_conf="$esp_mp/loader/entries/$memtest.conf"
+			if [ -f "/boot/$memtest" ]; then
+				echo "Adding $memtest .."
+				cp "/boot/$memtest" "$esp_mp/EFI/"
+				cat > "$memtest_conf.tmp" <<- EOF
+					title Memory test ($memtest)
+					efi   /EFI/$memtest
+				EOF
+				mv "$memtest_conf.tmp" "$memtest_conf"
+			fi
 		fi
 	else
 		echo "Installing grub i386-pc target.."
-- 
2.47.3