kernel: switch to dracut and remove (unused now) unionfs patch.

srcpkgs/kernel/kernel-headers.template

@@ -1,17 +1,14 @@
 # Template file for 'kernel-headers'.
 #
+nostrip=yes
+noverifyrdeps=yes
 short_desc="${pkgname} src headers"
 long_desc="
  This package contains the required source headers to be able to build
  external 3rd party binary modules."
 
-nostrip=yes
-noverifyrdeps=yes
-
 do_install() {
-	mkdir -p ${DESTDIR}/lib/modules/${_kernver}
-	mv ${SRCPKGDESTDIR}/usr ${DESTDIR}
-	mv ${SRCPKGDESTDIR}/lib/modules/${_kernver}/build \
-		${DESTDIR}/lib/modules/${_kernver}
+	vmove usr
+	vmove lib/modules/${_kernver}/build lib/modules/${_kernver}
 
 }