chore: migrate src to solutions

solutions/02_modules/exercice04/host.mk

@@ -0,0 +1,16 @@
+ifneq ($(KERNELRELEASE),)
+obj-m += mymodule.o		## name of the generated module
+
+mymodule-objs := skeleton.o	## list of objects needed for that module
+
+else
+KDIR := /lib/modules/$(shell uname -r)/build
+PWD := $(shell pwd)
+ 
+all:
+	$(MAKE) -C $(KDIR) M=$(PWD) modules
+ 
+clean:
+	$(MAKE) -C $(KDIR) M=$(PWD) clean
+ 
+endif