Add prebuilt RV32 Quake (#13)

New target "quake" was added to build system. It can download Quake
shareware data.

Check the repository for RISC-V porting:
    https://github.com/Korin777/quakembd

Author: Korin777

Makefile

@@ -77,16 +77,29 @@ $(OUT)/DOOM1.WAD:
 	sha1sum -c $@.sha1
 	$(RM) shareware_doom_iwad.zip
 
+Quake_shareware = https://www.libsdl.org/projects/quake/data/quakesw-1.0.6.zip
+$(OUT)/id1/pak0.pak:
+	$(VECHO) " Downloading $@ ...\n"
+	wget $(Quake_shareware)
+	unzip -d $(OUT) quakesw-1.0.6.zip
+	echo "36b42dc7b6313fd9cabc0be8b9e9864840929735  $@" > $@.sha1
+	sha1sum -c $@.sha1
+	$(RM) quakesw-1.0.6.zip	
+
 check: $(BIN)
 	(cd $(OUT); ../$(BIN) hello.elf)
 	(cd $(OUT); ../$(BIN) puzzle.elf)
 
 demo: $(BIN) $(OUT)/DOOM1.WAD
 	(cd $(OUT); ../$(BIN) doom.elf)
 
+quake: $(BIN) $(OUT)/id1/pak0.pak
+	(cd $(OUT); ../$(BIN) quake.elf)
+
 clean:
 	$(RM) $(BIN) $(OBJS) $(deps)
 distclean: clean
 	$(RM) $(OUT)/DOOM1.WAD $(OUT)/DOOM1.WAD.sha1
+	$(RM) -r $(OUT)/id1
 
 -include $(deps)