Invalid component glyph flags in the Ubuntu fonts

[IvanUkhov]

Describe the bug
When parsing the Glyph Data of the fonts in the ufl folder, there are glyphs where the Component Glyph Flags are set to 0x236. However, according to the specification, the bits given by 0xE010 are reserved, which making bit 4 contain an invalid value.

To Reproduce
Check the fourth bit in the Component Glyph Flags. For instance, using fonttools:

from fontTools.ttLib import TTFont

font = TTFont("ufl/ubuntucondensed/UbuntuCondensed-Regular.ttf")
hex(font["glyf"]["colon"].components[0].flags)
# 0x214

Here one should note that it is not 0x236 but 0x214 because of this “cleaning” conjunction:

_g_l_y_f.py#L1419-L1421

When printing the original value there, one gets 0x236.

Expected behavior
Bit 4 should not be set.

[fitojb]

cc @daltonmaag @canonical