Updated libtiff package fixes security vulnerabilities

In libtiff, in tifnext.c, a potential out-of-bound write in NeXTDecode triggered by the test case for CVE-2015-1547 maptools bugzilla 2508. In libtiff, in tifgetimage.c, out-of-bound reads in the TIFFRGBAImage interface in case of unsupported values of SamplesPerPixel/ExtraSamples for LogLUV /...