Remove package dri from cflags and libs

Fixes #32

Author: ardera

Makefile

@@ -1,7 +1,7 @@
 CC = cc
 LD = cc
-REAL_CFLAGS = -I./include $(shell pkg-config --cflags dri gbm libdrm glesv2 egl) -DBUILD_ELM327_PLUGIN -DBUILD_TEST_PLUGIN -ggdb $(CFLAGS)
-REAL_LDFLAGS = $(shell pkg-config --libs dri gbm libdrm glesv2 egl) -lrt -lflutter_engine -lpthread -ldl $(LDFLAGS)
+REAL_CFLAGS = -I./include $(shell pkg-config --cflags gbm libdrm glesv2 egl) -DBUILD_ELM327_PLUGIN -DBUILD_TEST_PLUGIN -ggdb $(CFLAGS)
+REAL_LDFLAGS = $(shell pkg-config --libs gbm libdrm glesv2 egl) -lrt -lflutter_engine -lpthread -ldl $(LDFLAGS)
 
 SOURCES = src/flutter-pi.c src/platformchannel.c src/pluginregistry.c src/console_keyboard.c \
 	src/plugins/elm327plugin.c src/plugins/services-plugin.c src/plugins/testplugin.c src/plugins/text_input.c \
@@ -20,4 +20,4 @@ out/flutter-pi: $(OBJECTS)
 
 clean:
 	@mkdir -p out
-	rm -rf $(OBJECTS) out/flutter-pi out/obj/*
+	rm -rf $(OBJECTS) out/flutter-pi out/obj/*