Apply all source related changes for the new INSTALL.md in one commit.

For people who want to have dkPless builds in their repo.

tools/bin2c/Makefile

@@ -6,10 +6,16 @@ CFLAGS = -Wall -Wextra -Werror -std=c11 -O2
 
 SRCS = bin2c.c
 
-all: bin2c
+ifeq ($(OS),Windows_NT)
+EXE := .exe
+else
+EXE :=
+endif
+
+all: bin2c$(EXE)
 	@:
 
-bin2c: $(SRCS)
+bin2c$(EXE): $(SRCS)
 	$(CC) $(CFLAGS) $(SRCS) -o $@ $(LDFLAGS)
 
 clean: