no point in sending alignment info to libc memcpy()
link in memcpy after opts and lto if it shows up only at that time
fix compiling of postrinsic memcpy when in forced c++ mode for the main file
call library aliases directly by their target name
remove unneeded malloc/free/etc. stuff from library.js
do not emit values for redirected library idents, they would not be used anyhow
restore basic malloc/free implementation
fix calling of functions library-redirected to Math.*
properly name Math.* redirects in function table
disable memcpy-using tests in s_x_x, it requires emcc now
add Math.abs to default asm imports
add all math functions to asm
export memcpy in asm mode so non-asm library functions can use it
auto-export some special functions if they are dependencies of a JS library element
Merge branch 'incoming' into asm_js_nomerge

Conflicts:
	tests/runner.py