textproc/exempi: update to 2.5.2

2.5.0

- Upgrade XMPCore to Adobe XMP SDK CC 2016.07
  - Support for iOS in XMPFiles
  - New DOM based API’s are added in XMP Core to access metadata tree
    hierarchy. (not exposed yet in Exempi)
  - Added support XMP/metadata in utf-8 encoded uncompressed SVG files in XMPFiles.
  - Added support of GIF handler in XMPFiles.
  - Added support for reconciliation of iXML’s TRACK_LIST and its components to get
    microphone data.
  - Added support for IFDs of type 13 in TIFF.
  - Added support for MPEG4 videos shot from Google Nexus 5 camera.
  - Restructured the implementation of XDCAM Handler to support File Access Mode (FAM)
    and Simple Access Mode (SAM)
  - Added inbuilt support for iXML namespace in XMPCore.
  - Modified the alias tiff:ImageDescription for dc:description as language alternative
    array instead of simple property.
  - Lot of bug fixes in XMPFiles and XMPCore.
- Removed Exempi provided support for GIF in favour of Adobe's.
- New: API NS_XML constant

Internal:

- Added tests for Adobe SDK.
- Fixed warnings and other issues and Adobe SDK.
- Compile with much more warnings enabled.

2.4.5 - 2018/03/07

- Bug #105204: [CVE-2018-7730] fix a buffer overflow in the PSD parser.
- Bug #105205: [CVE-2018-7728] fix a buffer overflow in the TIFF parser.
- Bug #105206: [CVE-2018-7729] fix a buffer overflow in PostScript parser.
- Bug #105247: [CVE-2018-7731] fix a null dereference in WEBP parser.

2.4.4 - 2018/02/04

- Bug #102197: Properly initialize pointers in WEBP.
- Bug #102151: Fix an infinite loop in RIFF parser.
- Bug #102483: Fix an infinite loop in QuickTime parser.
- Bug #102484: Fix an infinite loop in ASF parser.
- Bug #104885: Adjust minimum version for gcc in documentation.

2.4.3 - 2017/08/03

- Bug #100397: Fix a buffer overrun, memcpy() on overlapping
  regions, use after free in the exception handling.
- Bug #101913: Fix a fatal assert with corrupt WEBP.
- Bug #101914: Fix a crash on a corrupt file.

2.4.2 - 2017/01/29

- Properly define BanAllEntityUsage.
  See https://bugzilla.redhat.com/show_bug.cgi?id=888765

2.4.1 - 2017/01/23

- Bug #99494: Restore error reporting.

Internal:

- Added test for xmp_parse()
- Renamed test3 to testiterator and more comprehensive test for
  iterator to detect thing like bug 99480

Release notes:

- In 2.4.0 the XMP iterator corrected behaviour when used for
  XMP_ITER_JUSTLEAFNAME: The returned values are now set to they
  actual schema NS instead of the top level one.
  This required fixed in third party packages:
  https://github.com/python-xmp-toolkit/python-xmp-toolkit/issues/67
  This changes is the result of a bug fix in Adobe SDK.
  See bug #99480

2.4.0 - 2017/01/07

- Bug #89449: Upgrade XMPCore to Adobe XMP CC 2014.12.
  - New flag to optimize layout on MPEG4 files.
  - GoPro MPEG4 video files support.
  - Improved JPEG support.
  - iXML support in WAVE files.
  - Several bugs and memory leaks fixes.
  - Changes from Adobe XMP CC 2013.06.
    - Pluggable file handlers (not exposed yet in Exempi)
    - Support for Exif 2.3 properties
    - New RIFF file handler
    - Better Postscript support.
    - Lot of bug fixes.
- New API: added XMP_OPEN_OPTIMIZEFILELAYOUT for new SDK.
- Now require (partial) C++11 support to compile (gcc 4.4.7 tested)
- New: WebP format handler (contributed: Frankie Dintino, The Atlantic)

Internal:

- Exempi is now automatically build and the test run by Travis CI.

2.3.0 - 2016/03/15

- New: API xmp_datetime_compare().
- New: API xmp_string_len() to get the length of the XmpString.
- Bug #94065:
  - New: API xmp_files_can_put_xmp_xmpstring() and xmp_files_can_put_xmp_cstr()
    variants.
  - New: API xmp_files_put_xmp_xmpstring() and xmp_files_put_xmp_cstr()
    variants.
  - New: API xmp_files_get_xmp_xmpstring() variant.
  - Test: check the status of the PDF handler.
- Bug #90380: Fix potential crash with corrupt TIFF file.
- Bug #14612: Better Solaris compilation fix.
- Fix header to pass -Wstrict-prototypes