Fix blurry text printinting with HP LaserJet CP1025 color on ubuntu 12.04

Works out of the box but black TEXT appears blurry (black on pix looks fine). This is Bug #889306 HP LaserJet CP1025 and CP1025nw blurry print 3.11.[7 & 10 & 12] & 3.12.2. Easily fixed by upgrading hplip to HPLIP 3.12.4 (Ubuntu 12.04 ships with hplip 3.12.2). HowTo is here.