Changed function test runtime selection method to match method used by Jenkins

Change-Id: I99339ad4f69694bac49dd418fbd2caf11ebe7443
Signed-off-by: Botond Baranyi <botond.baranyi@ericsson.com>

function_test/Makefile

@@ -28,7 +28,7 @@ SCRIPTFLAGS += -coverage
 endif
 # Runtime selection
 #RT2 := yes
-ifeq ($(RT2), yes)
+ifdef RT2
 SCRIPTFLAGS += -rt2
 endif
 

function_test/Semantic_Analyser/Makefile.semantic

@@ -14,7 +14,7 @@
 ##############################################################################
 SADIRS := ver xer encode param template any_from pattern_ref float recof_index \
 port_translation
-ifeq ($(RT2), yes)
+ifdef RT2
 SADIRS += deprecated erroneous_attributes template_concat
 endif
 #$(wildcard TTCN3_[a0-9]* ASN_[a0-9]*) ver xer

function_test/Semantic_Analyser/common.mk

@@ -17,7 +17,7 @@
 
 # Flags for the TTCN-3 and ASN.1 compiler:
 COMPILER_FLAGS := -s -g
-ifeq ($(RT2), yes)
+ifdef RT2
 COMPILER_FLAGS += -R
 endif