[coreboot] [PATCH]libpayload: libc-style headers, some more functions

[Patrick Georgi]

Hi,

attached patch moves functions out of the huge libpayload.h into headers
according to libc/posix traditions, to simplify porting applications to
payloads.

It also adds a couple of functions:
strcasecmp, strncasecmp, strcat, strtol, strspn, strcspn, strtok_r,
strtok, perror, exit, getpagesize

baiyin cai, I added you to the recipients, as marc indicated that this
might overlap with your summer of code effort.

Comments are appreciated.

Signed-off-by: Patrick Georgi