[openwrt/openwrt] build: add gzip to prereq-build.mk

[LEDE Commits]

ansuel pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/f595bebc7fc67255dc05ec4c1b74b0349c1d2aa3

commit f595bebc7fc67255dc05ec4c1b74b0349c1d2aa3
Author: Tony Butler <spudz76 at gmail.com>
AuthorDate: Fri Dec 2 12:05:08 2022 -0800

    build: add gzip to prereq-build.mk
    
    gzip has never been checked for, a system without it would be rare, fix
    it anyway
    
    Signed-off-by: Tony Butler <spudz76 at gmail.com>
---
 include/prereq-build.mk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/prereq-build.mk b/include/prereq-build.mk
index c5c2f1c8bb..9c4ef547ad 100644
--- a/include/prereq-build.mk
+++ b/include/prereq-build.mk
@@ -149,6 +149,9 @@ $(eval $(call SetupHostCommand,stat,Cannot find a file stat utility, \
 	gstat -c%s $(TOPDIR)/Makefile, \
 	stat -c%s $(TOPDIR)/Makefile))
 
+$(eval $(call SetupHostCommand,gzip,Please install 'gzip', \
+	gzip --version </dev/null))
+
 $(eval $(call SetupHostCommand,unzip,Please install 'unzip', \
 	unzip 2>&1 | grep zipfile, \
 	unzip))