QJson installs an unnecessary prl file from it's build process

[superm1@…]

I notice on the install that a file usr/lib/libmythqjson.prl is included after a build. This is an artifact from the build process and I dont' believe it should be installed from make install.

Here's the contents of it after my build:

QMAKE_PRL_BUILD_DIR = /home/supermario/ubuntu/incoming/mythtv-0.26.0~master.20120622.397e464/mythtv/external/qjson/src/
QMAKE_PRO_INPUT = src.pro
QMAKE_PRL_TARGET = libmythqjson.so.0.7.1
QMAKE_PRL_CONFIG = include_source_dir lex yacc debug uic resources qt incremental link_prl gdb_dwarf_index def_files_disabled exceptions no_mocdepend stl qt_no_framework linux profile use_hidesyms using_alsa using_oss using_pulse using_pulseoutput using_backend using_bindings_perl using_bindings_python using_bindings_php using_crystalhd using_dvb using_firewire using_frontend using_hdhomerun using_ceton using_hdpvr using_iptv using_ivtv using_joystick_menu using_libcec using_libcrypto using_libdns_sd using_libxml2 using_lirc using_mheg using_opengl_video using_qtwebkit using_qtscript using_qtdbus using_v4l2 using_x11 using_xrandr using_xv using_bindings_perl using_bindings_python using_bindings_php using_mythtranscode using_opengl using_vaapi using_vdpau using_ffmpeg_threads using_live using_mheg using_libass using_libxml2 debug create_prl moc thread dll
QMAKE_PRL_VERSION = 0.7.1

}}

[Gavin Hurlbut <ghurlbut@…>]

In b6d65fcce17031cb729b6f68c1edabcfd5f11670/mythtv:

Move external libs installed includes under $PREFIX/include/mythtv

Also removed the useless libmythqjson.prl file

Fixes #10859. Fixes #10860. Fixes #10861.