Upgrade libxml2 and its portage dependencies

sys-libs/zlib/files/zlib-1.2.3-LDFLAGS.patch

Index: sys-libs/zlib/files/zlib-1.2.3-LDFLAGS.patch
diff --git a/sys-libs/zlib/files/zlib-1.2.3-LDFLAGS.patch b/sys-libs/zlib/files/zlib-1.2.3-LDFLAGS.patch
new file mode 100644
index 0000000000000000000000000000000000000000..86da956eb5f45d5b18e5e199005694ee25833a18
--- /dev/null
+++ b/sys-libs/zlib/files/zlib-1.2.3-LDFLAGS.patch
@@ -0,0 +1,31 @@
+--- zlib-1.2.3/Makefile.in
++++ zlib-1.2.3/Makefile.in
+@@ -24,7 +24,7 @@
+ #CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+ #           -Wstrict-prototypes -Wmissing-prototypes
+ 
+-LDFLAGS=libz.a
++TEST_LDFLAGS=libz.a
+ LDSHARED=$(CC)
+ CPP=$(CC) -E
+ 
+@@ -83,16 +83,16 @@
+ 	$(CC) $(CFLAGS) -DPIC -fPIC -c $< -o $@
+ 
+ $(SHAREDLIBV): $(PIC_OBJS)
+-	$(LDSHARED) -o $@ $(PIC_OBJS) -lc
++	$(LDSHARED) -o $@ $(PIC_OBJS) -lc $(LDFLAGS)
+ 	rm -f $(SHAREDLIB) $(SHAREDLIBM)
+ 	ln -s $@ $(SHAREDLIB)
+ 	ln -s $@ $(SHAREDLIBM)
+ 
+ example$(EXE): example.o $(LIBS)
+-	$(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS)
++	$(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS) $(TEST_LDFLAGS)
+ 
+ minigzip$(EXE): minigzip.o $(LIBS)
+-	$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
++	$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS) $(TEST_LDFLAGS)
+ 
+ install-libs: $(LIBS)
+ 	-@if [ ! -d $(exec_prefix) ]; then mkdir -p $(exec_prefix); fi