apply library synonyms using wrapper functions, to avoid needing hack…

…s in the compiler ; 1.19.2

set MAX_SETJMPS to fastcomp; 1.18.4

v1.18.2

Merge branch 'sdl_mouse_wheel' of github.com:jechter/emscripten into …

…incoming

Conflicts:
	emscripten-version.txt