openjpeg: pass correct libdir to cmake

When MACHINE=qemux86-64 and enable multilib:
ERROR: QA Issue: openjpeg: Files/directories were installed but not
shipped in any package:
  /usr/lib
  /usr/lib/libopenjp2.so
  /usr/lib/libopenjp2.so.2.1.0
  /usr/lib/libopenjp2.so.7
  /usr/lib/.debug
  /usr/lib/pkgconfig
  /usr/lib/.debug/libopenjp2.so.2.1.0
  /usr/lib/pkgconfig/libopenjp2.pc
Please set FILES such that these items are packaged. Alternatively if they are unneeded, avoid installing them or delete them within do_install. [installed-vs-shipped]

Pass the correct libdir configuration option to cmake.

Signed-off-by: Yi Zhao <yi.zhao@windriver.com>