replace = by := when it is constant

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@6205 818b1a75-f10b-46b9-bf7c-635c3b92a50f

targets/RT/USER/Makefile

@@ -6,9 +6,9 @@ all: lte-softmodem rrh
 
 include $(OPENAIR_TARGETS)/Makefile.common
 
-KERNEL_VERSION=$(shell echo `uname -r | cut -d. -f-2`)
-KERNEL_TYPE=$(shell echo `uname -r | cut -d. -f-3 | cut -d- -f3`)
-LOWLATENCY_KERNEL=$(shell if [ $(KERNEL_TYPE) = "lowlatency" ]; then echo "1" ; else echo "0" ; fi)
+KERNEL_VERSION:=$(shell echo `uname -r | cut -d. -f-2`)
+KERNEL_TYPE:=$(shell echo `uname -r | cut -d. -f-3 | cut -d- -f3`)
+LOWLATENCY_KERNEL:=$(shell if [ $(KERNEL_TYPE) = "lowlatency" ]; then echo "1" ; else echo "0" ; fi)
 
 #ifdef LOWLATENCY # this ifdef is to be removed after the debugging
 ifeq ($(LOWLATENCY_KERNEL),1)