Update woff2 to 4e698b8

third_party/woff2/Makefile

 OS := $(shell uname)
 
 CPPFLAGS = -I./brotli/dec/ -I./brotli/enc/ -I./src
 
 CC ?= gcc
 CXX ?= g++
 
-COMMON_FLAGS = -fno-omit-frame-pointer -no-canonical-prefixes -DFONT_COMPRESSION_BIN
+COMMON_FLAGS = -fno-omit-frame-pointer -no-canonical-prefixes -DFONT_COMPRESSION_BIN -D __STDC_FORMAT_MACROS
 
 ifeq ($(OS), Darwin)
   CPPFLAGS += -DOS_MACOSX
 else
   COMMON_FLAGS += -fno-tree-vrp
 endif
 
 CFLAGS += $(COMMON_FLAGS)
 CXXFLAGS += $(COMMON_FLAGS) -std=c++11
 
 SRCDIR = src
 
 OUROBJ = font.o glyph.o normalize.o table_tags.o transform.o \
-         woff2_dec.o woff2_enc.o woff2_common.o variable_length.o
+         woff2_dec.o woff2_enc.o woff2_common.o woff2_out.o \
+         variable_length.o
 
 BROTLI = brotli
 ENCOBJ = $(BROTLI)/enc/*.o
 DECOBJ = $(BROTLI)/dec/*.o
 
 OBJS = $(patsubst %, $(SRCDIR)/%, $(OUROBJ))
 EXECUTABLES=woff2_compress woff2_decompress
 
 EXE_OBJS=$(patsubst %, $(SRCDIR)/%.o, $(EXECUTABLES))
 
+ifeq (,$(wildcard $(BROTLI)/*))
+  $(error Brotli dependency not found : you must initialize the Git submodule)
+endif
+
 all : $(OBJS) $(EXECUTABLES)
 
 $(EXECUTABLES) : $(EXE_OBJS) deps
         $(CXX) $(LFLAGS) $(OBJS) $(ENCOBJ) $(DECOBJ) $(SRCDIR)/$@.o -o $@
 
 deps :
         $(MAKE) -C $(BROTLI)/dec
         $(MAKE) -C $(BROTLI)/enc
 
 clean :
         rm -f $(OBJS) $(EXE_OBJS) $(EXECUTABLES)
         $(MAKE) -C $(BROTLI)/dec clean
         $(MAKE) -C $(BROTLI)/enc clean