Removed dubious #undef of keywords

Removed
 #undef bool
 #undef void
 #undef const

Which are surely old hacks.
Fixes clang -Wkeyword-macro warnings.

Change-Id: I850a45677abc9d1063435845dec1c0a85e7d83f8
Merge topic 'dashwarnings' into master

bdfb1cd8 Removed dubious #undef of keywords