Add makefile for linux version of NWB

Source/Plugins/NWBFormat/Makefile

+
+LIBNAME := $(notdir $(CURDIR))
+OBJDIR := $(OBJDIR)/$(LIBNAME)
+TARGET := $(LIBNAME).so
+
+LDFLAGS += -l:OpenEphysHDF5Lib.so
+
+SRC_DIR := ${shell find ./ -type d -print}
+VPATH := $(SOURCE_DIRS)
+
+SRC := $(foreach sdir,$(SRC_DIR),$(wildcard $(sdir)/*.cpp))
+OBJ := $(addprefix $(OBJDIR)/,$(notdir $(SRC:.cpp=.o)))
+
+BLDCMD := $(CXX) -shared -o $(OUTDIR)/$(TARGET) $(OBJ) $(LDFLAGS) $(RESOURCES) $(TARGET_ARCH)
+
+VPATH = $(SRC_DIR)
+
+.PHONY: objdir
+
+$(OUTDIR)/$(TARGET): objdir $(OBJ)
+	-@mkdir -p $(BINDIR)
+	-@mkdir -p $(LIBDIR)
+	-@mkdir -p $(OUTDIR)
+	@echo "Building $(TARGET)"
+	@$(BLDCMD)
+
+$(OBJDIR)/%.o : %.cpp
+	@echo "Compiling $<"
+	@$(CXX) $(CXXFLAGS) -o "$@" -c "$<"
+	
+	
+objdir:
+	-@mkdir -p $(OBJDIR)
+
+clean:
+	@echo "Cleaning $(LIBNAME)"
+	-@rm -rf $(OBJDIR)
+	-@rm -f $(OUTDIR)/$(TARGET)
+
+-include $(OBJ:%.o=%.d)