kni: fix missing backslash in Makefile

With GNU Make 3.81 on Ubuntu 14.04, I get:
lib/librte_eal/linuxapp/kni/Makefile:49: *** unterminated call to function `shell': missing `)'.  Stop.

Signed-off-by: Julien Cretin <julien.cretin@trust-in-soft.com>
Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>

diff --git a/lib/librte_eal/linuxapp/kni/Makefile b/lib/librte_eal/linuxapp/kni/Makefile
index 4b5d873..2799191 100644 (file)
--- a/lib/librte_eal/linuxapp/kni/Makefile
+++ b/lib/librte_eal/linuxapp/kni/Makefile
@@ -46,7 +46,7 @@ MODULE_CFLAGS += -Wall -Werror
 
 ifeq ($(shell lsb_release -si 2>/dev/null),Ubuntu)
 MODULE_CFLAGS += -DUBUNTU_RELEASE_CODE=$(shell lsb_release -sr | tr -d .)
-UBUNTU_KERNEL_CODE := $(shell cut -d' ' -f2 /proc/version_signature |
+UBUNTU_KERNEL_CODE := $(shell cut -d' ' -f2 /proc/version_signature | \
                         cut -d- -f1,2 | tr .- $(comma))
 MODULE_CFLAGS += -D"UBUNTU_KERNEL_CODE=UBUNTU_KERNEL_VERSION($(UBUNTU_KERNEL_CODE))"
 endif