message: docs(capi): build 'upload' example too by default
diff: #
  TARGET = client
  +TARGET2 = upload
  OBJS = client.o
  +OBJS2 = upload.o
  RPATH=$(PWD)/../../target/debug
  CFLAGS = -I../include
  LDFLAGS = -L$(RPATH) -Wl,-rpath,$(RPATH)
  LIBS = -lhyper
  +all: $(TARGET) $(TARGET2)
  +
  $(TARGET): $(OBJS)
  $(CC) -o $(TARGET) $(OBJS) $(LDFLAGS) $(LIBS)
  -upload: upload.o
  - $(CC) -o upload upload.o $(LDFLAGS) $(LIBS)
  +$(TARGET2): $(OBJS2)
  + $(CC) -o $(TARGET2) $(OBJS) $(LDFLAGS) $(LIBS)
  clean:
  - rm -f $(OBJS) $(TARGET)
  - rm -f upload upload.o
  + rm -f $(OBJS) $(TARGET) $(OBJS2) $(TARGET2)
  