build: switch from hardcoded gcc to default c compiler

	modified:   tests/Makefile

Signed-off-by: Oliver Pinter <op@crysys.hu>
diff --git a/tests/Makefile b/tests/Makefile
index 5975013..b7f7ef4 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -4,7 +4,8 @@
 INCDIR = ../include
 LIBDIR = ..
 
-CC = $(CROSS)gcc
+CC ?= $(CROSS)cc
+
 CFLAGS += -fPIC -O3 -Wall -I$(INCDIR) -L$(LIBDIR)
 
 LIBNAME = capstone