vfb test: add missing Makefile, fix build

Author: ponty

.gitignore

@@ -20,7 +20,7 @@
 moc_*.cpp
 qrc_*.cpp
 ui_*.h
-Makefile*
+#Makefile*
 *-build-*
 
 # QtCreator

Vagrantfile

@@ -81,7 +81,7 @@ Vagrant.configure(2) do |config|
   sudo apt-get install -y xvfb
   sudo apt-get install -y python3-pip
   sudo apt-get install -y libvncserver-dev
-  sudo apt-get install -y build-essential
+  sudo apt-get install -y build-essential flex bison
   sudo apt-get install -y cmake
   sudo apt-get install -y qt5-qmake qt5-default
   sudo apt-get install -y linux-source libssl-dev libelf-dev

tests/vfb/Makefile

@@ -0,0 +1,12 @@
+ifneq ($(KERNELRELEASE),)
+obj-m   := vfb.o
+else
+KDIR    := /lib/modules/$(shell uname -r)/build
+PWD     := $(shell pwd)
+all:
+	$(MAKE) -C $(KDIR) M=$(shell pwd) modules
+install:
+	$(MAKE) -C $(KDIR) M=$(shell pwd) modules_install
+%:
+	$(MAKE) -C $(KDIR) M=$(shell pwd) $@
+endif