Add Makefile.otp and Emakefile for erlang build system

Emakefile

@@ -0,0 +1,6 @@
+{["src/*"],
+ [{i, "include"},
+  {outdir, "ebin"},
+  debug_info]
+}.
+

Makefile.otp

@@ -0,0 +1,31 @@
+
+ERL=erl
+APP=epcap
+
+CC=gcc
+
+ERL_LIB=/usr/local/lib/erlang/lib/erl_interface-3.7
+#ARCH=-m32
+CFLAGS=-g -Wall
+CPPFLAGS=-I$(ERL_LIB)/include
+LDFLAGS=-L$(ERL_LIB)/lib -lpcap -lerl_interface -lei -lpthread
+
+
+all: dir erl sccp_node
+
+dir:
+	-@mkdir -p priv/tmp ebin
+
+erl:
+	@$(ERL) -noinput +B \
+		-eval 'case make:all() of up_to_date -> halt(0); error -> halt(1) end.'
+
+sccp_node: c_src/sccp_node
+	@mv $^ priv/
+
+%.o: c_src/%.c
+	$(CC) $(ARCH) $(CFLAGS) $(CPPFLAGS) -o c_src/$@ -c $<
+
+clean:  
+	@rm -fv ebin/*.beam c_src/*.o
+