pdbg: bump to latest upstream version to fix build issues

This incorporates a fix supplied by Thomas to resolve build issues on
mips and blackfin.

The patch is dropped as it has been applied upstream.

Fixes:

  http://autobuild.buildroot.net/results/829bee459d7c27392b1c55ae3067607434f0b7f0/
  (mips64el)

  http://autobuild.buildroot.net/results/de51ba7e44a138aec877811d77d3d9b95bfce6b2/
  (blackfin)

  http://autobuild.buildroot.net/results/61ec486869b01f5c77e2cec57b60a1d3ca42af79/


  (mipsel)

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>