Build xdiff as well in Makefile.embed.
diff --git a/Makefile.embed b/Makefile.embed
index fb6b01b..8c26e77 100644
--- a/Makefile.embed
+++ b/Makefile.embed
@@ -9,7 +9,7 @@ INCLUDES= -I. -Isrc -Iinclude -Ideps/http-parser -Ideps/zlib
DEFINES= $(INCLUDES) -DNO_VIZ -DSTDC -DNO_GZIP -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE
CFLAGS= -g $(DEFINES) -Wall -Wextra -fPIC -O2
-SRCS = $(wildcard src/*.c) $(wildcard src/transports/*.c) $(wildcard src/unix/*.c) $(wildcard deps/http-parser/*.c) $(wildcard deps/zlib/*.c)
+SRCS = $(wildcard src/*.c) $(wildcard src/transports/*.c) $(wildcard src/unix/*.c) $(wildcard src/xdiff/*.c) $(wildcard deps/http-parser/*.c) $(wildcard deps/zlib/*.c)
OBJS = $(patsubst %.c,%.o,$(SRCS))
%.c.o: