fix(build): set KBUILD_BUILD_VERSION to silence .version warning#5
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The build process deletes linux-6.12.68/.version before invoking the kernel build, but the x86 boot banner later tries to read it to print the build number. This caused a stray "cat: .version: No such file or directory" warning and left the banner rendering as "(#)" with no number. Setting KBUILD_BUILD_VERSION=1 provides an explicit build version so the banner prints "(#1)" and the warning is suppressed.
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Summary
KERNEL_FLAGS += KBUILD_BUILD_VERSION=1to the top-levelMakefileso the kernel build has an explicit build version.linux-6.12.68/.versionbefore invoking the kernel build, but the x86 boot banner later tries to read it viacat .versionto render the build number.cat: .version: No such file or directorywarning and the banner renders asKernel: arch/x86/boot/bzImage is ready (#)with no number.KBUILD_BUILD_VERSION=1suppresses the warning and makes the banner print(#1), matching the intent of the otherKBUILD_BUILD_*flags already set alongside it.Test Plan
makeand confirm thecat: .version: No such file or directorywarning no longer appears.Kernel: arch/x86/boot/bzImage is ready (#1)instead of(#).libkrunfwartifact still builds and links as before (no functional change beyond the banner metadata).