kpatch: Mark it incompatible with musl

it needs binaries from glibc-utils, obviously we dont
have this with musl, however in future if we can limit
which binaries are needed from glibc-utils then we might
be able to provide an alternative dependency when using
musl, until then disable it

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-kernel/kpatch/kpatch.inc

@@ -30,6 +30,7 @@ PACKAGES =+ "kpatch-build"
 PROVIDES += "kpatch-build"
 
 COMPATIBLE_HOST = "(x86_64).*-linux"
+COMPATIBLE_HOST_libc-musl = "null"
 
 RDEPENDS_${PN} = "bash binutils"
 RDEPENDS_kpatch-build = "bash glibc-utils"