spidermonkey: update to gecko-dev 1930eae
Merge branch 'upstream' into wip2
spidermonkey: fix c++11 mfbt issue

This fixes the issue that IsPod<char16_t>()::value would be false when
compiling in c++11 mode.
gyp: fix build on linux
gyp build: add windows x64 support
WIP: remove NSPR dependency