Upgrade to libxml 2.9.2 and libxslt 1.1.28

third_party/libxml/src/Makefile.tests

Index: third_party/libxml/src/Makefile.tests
diff --git a/third_party/libxml/src/Makefile.tests b/third_party/libxml/src/Makefile.tests
new file mode 100644
index 0000000000000000000000000000000000000000..619cbfb85974a318fbd897defe313c766bf2c242
--- /dev/null
+++ b/third_party/libxml/src/Makefile.tests
@@ -0,0 +1,41 @@
+#
+# You may have to ajust to call the right compiler, or other oprions
+# for compiling and linking
+#
+
+CFLAGS=`xml2-config --cflags`
+LIBS=`xml2-config --libs`
+THREADLIB= -lpthread
+EXEEXT=
+
+all: runtest$(EXEEXT) runsuite$(EXEEXT) testapi$(EXEEXT) testchar$(EXEEXT)
+
+clean:
+	$(RM) runtest$(EXEEXT) runsuite$(EXEEXT) testapi$(EXEEXT)
+
+check: do_runtest do_testchar do_testapi do_runsuite
+
+runtest$(EXEEXT): runtest.c
+	$(CC) -o runtest$(EXEEXT) $(CFLAGS) runtest.c $(LIBS) $(THREADLIB)
+
+do_runtest: runtest$(EXEEXT)
+	./runtest
+
+runsuite$(EXEEXT): runsuite.c
+	$(CC) -o runsuite$(EXEEXT) $(CFLAGS) runsuite.c $(LIBS)
+
+do_runsuite: runsuite$(EXEEXT)
+	./runsuite
+
+testapi$(EXEEXT): testapi.c
+	$(CC) -o testapi$(EXEEXT) $(CFLAGS) testapi.c $(LIBS)
+
+do_testapi: testapi$(EXEEXT)
+	./testapi
+
+testchar$(EXEEXT): testchar.c
+	$(CC) -o testchar$(EXEEXT) $(CFLAGS) testchar.c $(LIBS)
+
+do_testchar: testchar$(EXEEXT)
+	./testchar
+