Parser: add usage counters for "use asm".

R=jochen@chromium.org
BUG=

Review URL: https://codereview.chromium.org/336863007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22093 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix compilation on arm after r22092

TBR=yangguo@chromium.org
LOG=n
BUG=none

Review URL: https://codereview.chromium.org/360723002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22094 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge commit '4c9c34e3a7475d9516883cd5603da385a7692ad2' into mips64-gbl
MIPS64: Fix compilation on mips64 after r22092

Port r22094 (4c9c34e)