NaCl target system is now handled with CORRADE_TARGET_NACL.
Merge branch 'master' into compatibility

Conflicts:
	CMakeLists.txt
Updated FindCorrade.cmake from Corrade repository.
Separate PKGBUILDs for both NaCl newlib and glibc.
Math: std::hypot() is not available in NaCl newlib.

Probably bug / not-yet-implemented feature.
Merge branch 'master' into compatibility