ui: Fix mime type for C code
ui: Fix mime type for C code

Signed-off-by: Ola Jeppsson <793f970c52ded1276b9264c742f19d1888cbaf73@adapteva.com>

olajep/gcc-explorer,olajep/gcc-explorer,olajep/gcc-explorer,olajep/gcc-explorer,olajep/gcc-explorer,olajep/gcc-explorer