Inline strcmp calls in the standard cursor functions, clang, at least on
OS X (Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)),
doesn't inline strcmp.
Apparently, WT_CURSOR_RAW_OK is a lot more subtle than I realized --
move back to the original format/order, just replace the strcmp calls.
Add a WT_STREQ macro for fast constant string equality checking.
Merge pull request #1110 from wiredtiger/inline-strcmp

Inline strcmp calls in the standard cursor functions