devel/lfcbase: update 1.11.7 -> 1.11.8

• Extensions made for Chain::toLower and Chain::toUpper methods. To treat multi character strings, a conversion is made to wide characters using mbstowcs libc function. case conversion now is done with towupper / towlower wide character function. Strings are then converted back to multicharacters using wcstombs function.
• This allows upper/lower case conversion now for german Umlaute which have actually not been treated

Submitted by: Bjoern Lemke <lemke@lemke-it.com>