gallium: Fix build with llvm installed in non-standard location

The es1, es2 and gl state trackers include draw_pipe.h, which includes
the llvm headers if MESA_LLVM is true, so we also need to add the
llvm seachpaths.

Similarly, gallivm and other gallium drivers need LLVM_CFLAGS to build when enabled.

Also fix xorg drivers, they didn't include LDFLAGS.

src/gallium/Makefile.template

@@ -23,6 +23,10 @@ INCLUDES = \
 	-I$(TOP)/src/gallium/drivers \
 	$(LIBRARY_INCLUDES)
 
+ifeq ($(MESA_LLVM),1)
+LIBRARY_DEFINES += $(LLVM_CFLAGS)
+endif
+
 
 ##### TARGETS #####
 

src/gallium/targets/Makefile.xorg

@@ -42,7 +42,7 @@ endif
 default: depend $(TOP)/$(LIB_DIR)/gallium $(LIBNAME) $(LIBNAME_STAGING)
 
 $(LIBNAME): $(OBJECTS) Makefile ../Makefile.xorg $(LIBS) $(DRIVER_PIPES)
-	$(MKLIB) -noprefix -o $@ $(OBJECTS) $(DRIVER_PIPES) $(GALLIUM_AUXILIARIES) $(DRIVER_LINKS)
+	$(MKLIB) -noprefix -o $@ $(LDFLAGS) $(OBJECTS) $(DRIVER_PIPES) $(GALLIUM_AUXILIARIES) $(DRIVER_LINKS)
 
 depend: $(C_SOURCES) $(CPP_SOURCES) $(ASM_SOURCES) $(SYMLINKS) $(GENERATED_SOURCES)
 	rm -f depend

src/mesa/Makefile

@@ -20,6 +20,13 @@ MESA_CPPFLAGS := $(API_DEFINES)
 ES1_CPPFLAGS := -DFEATURE_ES1=1
 ES2_CPPFLAGS := -DFEATURE_ES2=1
 
+ifeq ($(MESA_LLVM),1)
+MESA_CPPFLAGS += $(LLVM_CFLAGS)
+ES1_CPPFLAGS += $(LLVM_CFLAGS)
+ES2_CPPFLAGS += $(LLVM_CFLAGS)
+endif
+
+
 include sources.mak
 
 # adjust object dirs