cmake: Update cmListFileLexer form upstream

Fixes some compile warnings:

cmListFileLexer.c:1578:17: warning: ‘yyunput’ defined but not used
[-Wunused-function]
cmListFileLexer.c:1626:16: warning: ‘input’ defined but not used
[-Wunused-function]

Changes:

• Remove cmListFileLexer.in.l, as we don't use it anyway
• Add cmStandardLexer.h
  • Patch out unnecessary dependency on cmConfigure.h
  • Patch out use of KWIML library, use Qt types where possible
• Patch cmListFileLexer.c
  • Include EncodingC.c directly