Update tex-pdftex-def to 0.05b.

Changes:
 2010/03/11 v0.04o (HO)
  * Ensure that \undefined is undefined during loading of
    ConTeXt files.
 2010/03/12 v0.04p (HO)
  * \undefined is also undefined during conversion of MPS.
 2010/04/14 v0.04q (HO)
  * Optimizations for rotating and scaling:
    * remove unnecessary identity transformations
    * numbers are normalized
 2010/04/15 v0.04r (HO)
  * Fix for scale values without integer part.
 2010/09/09 v0.05a (HO)
  * Option `pagebox' added for specifying the pdf page box
    of the included image. Values are `mediabox', `cropbox',
    `bleedbox', `trimbox' and `artbox'. Default is `cropbox'. (MS/HO)
  * Option `interpolate' added for bitmaps, see PDF specification.
    Values are `true' or `false', default is `false'.
  * Option `decodearray' added for bitmaps, see PDF specification,
    key /Decode of image dictionaries. The value for option
    `decodearray' is the value for /Decode without `[' and ']'.
  * Option `maskarray' added for bitmaps, see PDF specification,
    key /Mask of image dictionaries with array as value.
    The value of `maskarray' is the array value for /Mask
    without `[' and ']'.
  * Option `intent' added for the rendering intent of bitmap
    images, see PDF specification, key /Intent of image
    dictionaries. The value is a name without a leading slash,
    the standard names of the PDF specification:
    `AbsoluteColorimetric', `RelativeColorimetric',
    `Saturation', `Perceptual'.
  * Options `ocobjnum' and `ocobjref' are hooks for those who wants
    to work with optional content. The options can be used for both
    bitmap and PDF images and are unsupported for MPS.
    The optional content dictionary is given by an external
    object. Option `ocobjnum' expects the number of that object
    (e.g. \pdflastobj). It's a positive integer (greater than zero).
    Option `ocobjref' takes the full object reference
    (positive integer, followed by ` 0 R' in case of pdfTeX).
    Other drivers might support `ocobjref' as well, in case of
    PostScript/pdfmark drivers, the object is usually referenced by
    a name in curly braces.
  * Tiff support removed for driver versions between 1.10a and 1.30.
 2010/09/14 v0.05b (HO)
  * Fix, \pagecolor got broken accidentally (in v0.05a).


(minskim)