precomposed inverted breve letters do not have their marks

[iwsfutcmd]

The glyphs for the 8 precomposed inverted breve code points below contain the base character, but do not the inverted breve mark.

U+0206	LATIN CA­PI­TAL LET­TER E WITH INVERTED BREVE	
U+0207	LATIN SMALL LET­TER E WITH INVERTED BREVE	
U+020A	LATIN CA­PI­TAL LET­TER I WITH INVERTED BREVE	
U+020B	LATIN SMALL LET­TER I WITH INVERTED BREVE	
U+020E	LATIN CA­PI­TAL LET­TER O WITH INVERTED BREVE	
U+020F	LATIN SMALL LET­TER O WITH INVERTED BREVE	
U+0212	LATIN CA­PI­TAL LET­TER R WITH INVERTED BREVE	
U+0213	LATIN SMALL LET­TER R WITH INVERTED BREVE	

Sample from hb-view:

Fix:

Add inverted breve mark glyph to each of the above glyphs.

[ctrlcctrlv]

Hey Ben, thanks for all these notes. This one especially seems to affect FontForge. Do you mind if I mention these issues in FontForge issues?

Don't worry, I won't block on FontForge fixing them, I will just switch this to a fontmake build, I'm just asking because they should probably know that their Build Accented Glyph mechanism is so broken.