c: Fix C11 keywords (oops)

List keywords from ISO/IEC 9899:201x N1570 (2011-04-12), not N1425
(2009-11-24).

data/filetypes.c

@@ -33,7 +33,7 @@ escapesequence=string_1
 
 [keywords]
 # all items must be in one line
-primary=alignof asm auto break case char const continue default do double else enum extern float for goto if inline int long register restrict return short signed sizeof static struct switch typedef union unsigned void volatile while _Align _Bool _Complex _Imaginary _Static_assert _Thread_local FALSE NULL TRUE
+primary=asm auto break case char const continue default do double else enum extern float for goto if inline int long register restrict return short signed sizeof static struct switch typedef union unsigned void volatile while _Alignas _Alignof _Atomic _Bool _Complex _Generic _Imaginary _Noreturn _Static_assert _Thread_local FALSE NULL TRUE
 secondary=
 # these are the Doxygen keywords
 docComment=a addindex addtogroup anchor arg attention author authors b brief bug c callergraph callgraph category cite class code cond copybrief copydetails copydoc copyright date def defgroup deprecated details dir dontinclude dot dotfile e else elseif em endcode endcond enddot endhtmlonly endif endinternal endlatexonly endlink endmanonly endmsc endrtfonly endverbatim endxmlonly enum example exception extends file fn headerfile hideinitializer htmlinclude htmlonly if ifnot image implements include includelineno ingroup interface internal invariant latexonly li line link mainpage manonly memberof msc mscfile n name namespace nosubgrouping note overload p package page par paragraph param post pre private privatesection property protected protectedsection protocol public publicsection ref related relatedalso relates relatesalso remark remarks result return returns retval rtfonly sa section see short showinitializer since skip skipline snippet struct subpage subsection subsubsection tableofcontents test throw throws todo tparam typedef union until var verbatim verbinclude version warning weakgroup xmlonly xrefitem