This commit adds a new package to add Chinese language input support for
'ibus' via libpinyin.
This input engine supports Simplified Chinese PinYin and also Traditional
Chinese ZhuYin (Bopomofo) phoenetic input method.
PATCH 2: Cleaned up build process and dependencies
(*) Note that glib-devel is still needed beause the build process
uses the glib-gettextsize library on the host system.
(*) Moved ibus-devel to hostmakedepends to avoid causing ibus to be
built when cross compiling, which requires librsvg, which requires
rust, etc.
PATCH 3: Cleaned up long line
closes#6423
df9807f638