Merge identical tr_subs.c into renderercommon

Makefile

@@ -2081,10 +2081,10 @@ ifneq ($(USE_RENDERER_DLOPEN), 0)
     $(B)/renderergl1/tr_subs.o
 
   Q3R2OBJ += \
-    $(B)/renderergl1/q_shared.o \
-    $(B)/renderergl1/puff.o \
-    $(B)/renderergl1/q_math.o \
-    $(B)/renderergl1/tr_subs.o
+    $(B)/renderergl2/q_shared.o \
+    $(B)/renderergl2/puff.o \
+    $(B)/renderergl2/q_math.o \
+    $(B)/renderergl2/tr_subs.o
 endif
 
 ifneq ($(USE_INTERNAL_JPEG),0)
@@ -2937,6 +2937,9 @@ $(B)/renderergl2/glsl/%.c: $(RGL2DIR)/glsl/%.glsl $(STRINGIFY)
 $(B)/renderergl2/glsl/%.o: $(B)/renderergl2/glsl/%.c
 	$(DO_REF_CC)
 
+$(B)/renderergl2/%.o: $(CMDIR)/%.c
+	$(DO_REF_CC)
+
 $(B)/renderergl2/%.o: $(RCOMMONDIR)/%.c
 	$(DO_REF_CC)