Auto merge of #493 - teapotd:update-mozjs, r=jdm

Update mozjs_sys for RegExp constants

Update mozjs_sys for servo/mozjs@332d090

Author: bors-servo

Cargo.toml

@@ -53,4 +53,4 @@ lazy_static = "1"
 libc = "0.2"
 log = "0.4"
 num-traits = "0.2"
-mozjs_sys = { git = "https://github.com/servo/mozjs", rev = "59065889ec7726b767d70b8702b43b4e4776cbfe" }
+mozjs_sys = { git = "https://github.com/servo/mozjs", rev = "bc4935b668171863e537d3fb0d911001a6742013" }