* Use the definitions of ClangDefaultBase and ClangDefaultVersion
in build/soong/cc/config/global.go.
* scan-build is too old;
replaced by better clang-tidy's -clang-analyzer-* checks.
* WITH_STATIC_ANALYZER is still effective
to invoke ccc-analyzer or c++-analyzer.
Test: make checkbuild
Change-Id: Ifd159dd28e529d5d3c9807f5e391911365da8cdb