gn: update to latest

Brings fixes to build with gcc-13

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm/recipes-devtools/gn/gn_git.bb

@@ -6,7 +6,7 @@ LIC_FILES_CHKSUM = "file://LICENSE;md5=0fca02217a5d49a14dfe2d11837bb34d"
 
 SRC_URI = "git://gn.googlesource.com/gn;protocol=https;branch=main \
            file://0001-Replace-lstat64-stat64-functions-on-linux.patch"
-SRCREV = "edf6ef4b06b42c58292faea78498aff76bdf68ed"
+SRCREV = "4bd1a77e67958fb7f6739bd4542641646f264e5d"
 PV = "0+git${SRCPV}"
 
 S = "${WORKDIR}/git"