Add tiff 4.0.3.

libs/tiff-4.0.3/test/images/README.txt

@@ -0,0 +1,29 @@
+The test files in this directory mostly have dimension 157x151.
+The naming convention is
+
+   photometric-channels-bits.tiff
+
+minisblack-1c-16b.tiff
+minisblack-1c-8b.tiff
+miniswhite-1c-1b.tiff
+palette-1c-1b.tiff
+palette-1c-4b.tiff
+palette-1c-8b.tiff
+rgb-3c-16b.tiff
+rgb-3c-8b.tiff
+
+logluv-3c-16b.tiff: logluv compression/photometric interp
+minisblack-2c-8b-alpha.tiff: grey+alpha
+
+BMP files (anchient BMPv2 since v3 does not work):
+
+  palette-1c-8b.bmp
+  rgb-3c-8b.bmp
+
+GIF files (anchient GIF '87 since modern GIF does not work):
+  palette-1c-8b.gif
+
+PNM files:
+  minisblack-1c-8b.pgm
+  miniswhite-1c-1b.pbm
+  rgb-3c-8b.ppm