i#1551 Port DynamoRIO to ARM: update instrument.c to build on ARM
- add TLS_SLOT_R* and TLS_REG_R*
- add INSTR_CREATE_load and INSTR_CREATE_store
- replace DR_REG_STACK_PTR with DR_REG_XSP for cross-platform stack pointer
- add dr_save_arith_flags_to_reg and dr_restore_arith_flags_from_reg
- update instrument.c to build on ARM

R=bruening@google.com
BUG=1551

Review URL: https://codereview.appspot.com/166810043

git-svn-id: https://dynamorio.googlecode.com/svn/trunk@2923 49cc7528-f6fd-11dd-9d1a-b59b2e1864b6
10 files changed