20-grub-install: Explicitly check '+debug' suffix for debug kernels

The kernel-install script is also used to install kernels when built from
source using the `make install` target.

And if this source contains modifications, a '+' is added as suffix by the
scripts/setlocalversion if no LOCALVERSION was set in the kernel config.

This confuses the grub2 kernel-install plugin, since it currently assumes
that any kernel that contain a version with a '+' suffix is a debug kernel.

But the match is too greedy, just having '+debug' should be enough to check
whether the kernel to install is a debug kernel or not.

Related: #2184069
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>

20-grub.install

@@ -126,7 +126,7 @@ case "$COMMAND" in
                 sed -i -e "s,^initrd.*,initrd ${BOOTPREFIX}${INITRD},g" "${BLS_TARGET}"
             fi
 
-            if [[ "$KERNEL_VERSION" == *\+* ]] && [ "x$GRUB_DEFAULT_TO_DEBUG" != "xtrue" ]; then
+            if [[ "$KERNEL_VERSION" == *\+debug* ]] && [ "x$GRUB_DEFAULT_TO_DEBUG" != "xtrue" ]; then
                 GRUB_UPDATE_DEFAULT_KERNEL=false
             fi
 

grub2.spec

@@ -16,7 +16,7 @@
 Name:		grub2
 Epoch:		1
 Version:	2.06
-Release:	61%{?dist}
+Release:	62%{?dist}
 Summary:	Bootloader with support for Linux, Multiboot and more
 License:	GPLv3+
 URL:		http://www.gnu.org/software/grub/
@@ -533,6 +533,10 @@ mv ${EFI_HOME}/grub.cfg.stb ${EFI_HOME}/grub.cfg
 %endif
 
 %changelog
+* Tue May 23 2023 Javier Martinez Canillas <javierm@redhat.com> - 2.06-62
+- 20-grub-install: Explicitly check '+debug' suffix for debug kernels
+- Resolves: #2148351
+
 * Mon Feb 20 2023 Robbie Harwood <rharwood@redhat.com> - 2.06-61
 - ppc64le sysfs and mm update
 - Resolves: #2026579