Add Doxygen doc words to lexicon.txt. (#78)

lexicon.txt

@@ -3,16 +3,20 @@ api
 ascii
 bf
 bmp
+br
 buf
 bufferlength
 cbmc
+colspan
 com
 cond
 const
+copydoc
 corejson
 coverity
 dbff
 dc
+defgroup
 df
 dfff
 ecma
@@ -29,10 +33,14 @@ fe
 ff
 ffff
 foo
+gcc
+https
 ifndef
 inc
 ingroup
 int
+iot
+iso
 json
 jsonarray
 jsonbadparameter
@@ -54,6 +62,8 @@ jsontype
 keylength
 len
 longjmp
+mainpage
+microcontrollers
 min
 misra
 msb
@@ -62,6 +72,7 @@ nb
 nextkeyvaluepair
 noninfringement
 nul
+os
 outkey
 outkeylength
 outlength
@@ -74,6 +85,7 @@ printf
 queryindex
 querylength
 requirelowsurrogate
+rm
 sizeof
 skipanyliteral
 skiparrayscalars
@@ -91,7 +103,11 @@ skipspaceandcomma
 skipstring
 skiputf
 stderr
+struct
 sublicense
+td
+toolchain
+tr
 uint
 unescaped
 unicode