DynASM/ARM: Fix description shown for multi-element templates.
Merge branch 'master' into v2.1
DynASM/ARM64: Initial commit of ARM64 module.
x86/x64: Call external symbols directly from interpreter code.

Except for ELF/x86 PIC, where it's easier to use wrappers.
x86/x64: Drop internal x87 math functions. Use libm functions.
Avoid error messages when building with Clang.
Merge branch 'master' into v2.1
Merge branch 'v2.1' of http://luajit.org/git/luajit-2.0