Added a few string strip functions to the util namespace.
Added a few string strip functions to the util namespace.

YuanPeir-Chen/turbo-support-mipsel,luastoned/turbo,YuanPeir-Chen/turbo-support-mipsel,ddysher/turbo,mniestroj/turbo,zcsteele/turbo,ddysher/turbo,zcsteele/turbo,luastoned/turbo,kernelsauce/turbo