Build vulkan support into the example rendering plugin for linux

Author: Tak

PluginSource/projects/GNUMake/Makefile

@@ -1,9 +1,10 @@
 SRCDIR = ../../source
 SRCS = $(SRCDIR)/RenderingPlugin.cpp \
 $(SRCDIR)/RenderAPI.cpp \
-$(SRCDIR)/RenderAPI_OpenGLCoreES.cpp
+$(SRCDIR)/RenderAPI_OpenGLCoreES.cpp \
+$(SRCDIR)/RenderAPI_Vulkan.cpp
 OBJS = ${SRCS:.cpp=.o}
-UNITY_DEFINES = -DSUPPORT_OPENGL_UNIFIED=1 -DUNITY_LINUX=1
+UNITY_DEFINES = -DSUPPORT_OPENGL_UNIFIED=1 -DSUPPORT_VULKAN=1 -DUNITY_LINUX=1
 CXXFLAGS = $(UNITY_DEFINES) -O2 -fPIC
 LDFLAGS = -shared -rdynamic
 LIBS =