quazip: new package

[Thomas:
 - fix indentation of select BR2_PACKAGE_ZLIB in Config.in
 - rewrap Config.in help text, lines were too long
 - remove depends on BR2_PACKAGE_QT || BR2_PACKAGE_QT5, since
   quazip/Config.in is already only included if one of Qt4 or Qt5 is
   enabled.
 - remove QUAZIP_SOURCE definition, since its value was the default
 - add the missing zlib dependency in the .mk file
 - add spaces around '=' signs when setting QUAZIP_QMAKE
 - pass $(TARGET_MAKE_ENV) at install time]

Signed-off-by: Zoltan Gyarmati <mr.zoltan.gyarmati@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>