- pkg-config already prefers -uninstalled packages, and top-level configure.ac
  sets PKG_CONFIG_PATH to ensure build tree is searched first for libraries,
  so explicitly specifying -uninstalled should not be necessary
- also remove version requirements from -uninstalled pkg-config files, since
  library configure.ac will perform the same version checks
Original: c55625dd94ba3397c7d3757728d97f4c3b81e2cc