TypePrinter should not omit the static keyword in array parameter declarators

TypePrinter should not omit the static keyword in array parameter declarators

In C99, an array parameter declarator might have the form: direct-declarator
'[' 'static' type-qual-list[opt] assign-expr ']'

and when the size of the array is a constant, don't omit the static keyword
when printing the type. Also, in the VLA case, put a space after the static
keyword (some assignment expression must follow it).

llvm-svn: 213424