Revert revision 1.833 -- the reinstallkernel.debug target calls the

installkernel.debug target (in the kernel build directory) which is
only defined if the kernel was configured for debugging which it is
not the case for GENERIC kernels on release branches.

release/Makefile

@@ -541,7 +541,7 @@ release.4:
 	    DESTDIR=${RD}/trees/base; \
 	cd ${.CURDIR}/..; \
 	${CROSSMAKE} ${KERNEL_FLAGS} -DNO_MODULES \
-	    reinstallkernel.debug \
+	    reinstallkernel -DINSTALL_DEBUG \
 	    DESTDIR=${RD}/trees/base
 	touch ${.TARGET}