Rollup merge of #48058 - cuviper:binaryen-gcc8, r=alexcrichton
Rollup merge of #48058 - cuviper:binaryen-gcc8, r=alexcrichton

Update binaryen to fix -Werror with GCC 8

r? @alexcrichton

graydon/rust,graydon/rust,graydon/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,graydon/rust,graydon/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,graydon/rust,aidancully/rust,aidancully/rust