[tnozaki-flex] upgrade flex-2.5.35 to 2.6.4

[Takehiko NOZAKI]

• Issue #306 - include namespace.h for libc's code
• Issue #307 - suppress compiler/lint warning for noreturn, break, constcond
• Issue #308 - rename local variable name to protect namespace
• Issue #309 - disable YY_NO_UNPUT
• Issue #310 - YY_INPUT signed vs unsigned compare warning
• Issue #311 - rename warn() -> lwarn() to avoid conflict function in err.h have same name
• Issue #312 - ANSIfy prototype
• Issue #313 - change variable as static to avoid compiler/lint unused warning
• Issue #314 - avoid creating unused label YY_USES_REJECT
• Issue #315 - rename macro CHECK_REJECT to CHECK_RE_JECT to avoid poor scanner thinks it is using REJECT token
• Issue #316 - genc.c - use size_t instead of int to avoid sign/unsigned compare
• Issue #317 - use const char[] for fixed string instead of char *
• Issue #318 - comment out unused function action_m4_define()
• Issue #319 - ctype's is* function argument must be unsigned char
• Issue #320 - use strlcpy instead of strncpy
• Issue #321 - cast ptrdiff to int for printf format check
• Issue #322 - comment out unused function yytbl_data_getijk()
• Issue #323 - don't hide variable yytext
• Issue #324 - (N HEAD) add M4_GEN_PREFIX'' macro to flex.skel
• Issue #325 - (N HEAD) yy_leng type change int -> yy_size_t
• Issue #326 - (N HEAD) include nbtool_config.h for USETOOLS
• Issue #327 - mkskel.sh uses ${TOOL_SED} for USETOOLS

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[Takehiko NOZAKI]

#306: [tnozaki-flex] TNF's local patch - include namespace.h for libc's code

[Takehiko NOZAKI]

done, see <<cset:7e481ea82af264e9ca48d84d26181b8842dff6ef>>