[libpng17] Added some bad PNGs to the test directory and to the test/pngtest script

tests/bad_iccp.png

diff --git a/tests/bad_iccp.png b/tests/bad_iccp.png
new file mode 100644
index 0000000..0b7b863
--- /dev/null
+++ b/tests/bad_iccp.png
Binary files differ

tests/empty_ancillary_chunks.png

diff --git a/tests/empty_ancillary_chunks.png b/tests/empty_ancillary_chunks.png
new file mode 100644
index 0000000..d76477c
--- /dev/null
+++ b/tests/empty_ancillary_chunks.png
Binary files differ

tests/huge_idat.png

diff --git a/tests/huge_idat.png b/tests/huge_idat.png
new file mode 100644
index 0000000..efee66c
--- /dev/null
+++ b/tests/huge_idat.png
Binary files differ

tests/pngtest

diff --git a/tests/pngtest b/tests/pngtest
index d33f936..942e8c2 100755
--- a/tests/pngtest
+++ b/tests/pngtest
@@ -1,4 +1,7 @@
 #!/bin/sh
 ./pngtest --relaxed ${srcdir}/tests/badcrc.png
 ./pngtest --relaxed ${srcdir}/tests/badadler.png
+./pngtest --relaxed ${srcdir}/tests/bad_iccp.png
+./pngtest --relaxed ${srcdir}/tests/huge_idat.png
+./pngtest --relaxed ${srcdir}/tests/empty_ancillary_chunks.png
 exec ./pngtest --strict ${srcdir}/pngtest.png