Update LLVM lexer to use keywords of LLVM 7.0.
Update LLVM lexer to use keywords of LLVM 7.0.

The keywords are based extracted from the source code
of the LLVM lexer (llvm-7.0.0.src/lib/AsmParser) and
is based on the first argument to the KEYWORD,
TYPEKEYWORD and INSTKEYWORD macros. The list of keywords
were then sorted in lexicographic order.

A diff with added and removed keywords is made available
at https://gist.github.com/mewmew/508e090a361095eeb60ffa88321e878a

Specifically the following 10 keywords were removed:

	begin, dbg, end, free, getresult, linker_private,
	linker_private, malloc, singlethread and x86_64_win64cc

And 96 new keywords were added.

dscorbett/pygments,pygments/pygments,pygments/pygments,pygments/pygments,pygments/pygments,dscorbett/pygments,pygments/pygments,dscorbett/pygments,dscorbett/pygments,pygments/pygments,pygments/pygments,pygments/pygments,dscorbett/pygments,dscorbett/pygments,pygments/pygments,dscorbett/pygments,dscorbett/pygments,dscorbett/pygments,dscorbett/pygments,pygments/pygments,pygments/pygments,pygments/pygments,pygments/pygments,pygments/pygments,pygments/pygments,dscorbett/pygments,dscorbett/pygments,pygments/pygments,dscorbett/pygments,pygments/pygments,pygments/pygments,dscorbett/pygments,dscorbett/pygments,dscorbett/pygments,dscorbett/pygments,dscorbett/pygments