Revert "Remove erroneous uses of CXX / CXX_target / CXX_host from gyp."

This reverts commit r22425 for breaking the Arm debug builder.

BUG=384474
TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/393273002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22427 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Properly escape benchmark names when retrieving results.

This allows benchmarks to contain regular expression characters in their name.

BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/396203003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22428 ce2b1a6d-e550-0410-aec6-3dcde31c8c00