Currently scan-build cannot pass target triple information to clang.
It makes analysis failure when build script has target specific compiler flags.
This patch adds --analyzer-target option to support analysis for other targets.
--analyzer-target [target triple name for analysis] --analyzer-target=[target triple name for analysis] This provides target triple information to clang static analyzer. It only changes the target for analysis and doesn't change the target of a real compiler given by --use-cc and --use-c++ options.