Add application-specific hash to FileLockMutex
Add application-specific hash to FileLockMutex

The temporary directory may be shared across multiple concrete5 instances,
and we need to be sure that the mutex are instance-specific.

hissy/concrete5,haeflimi/concrete5,a3020/concrete5,olsgreen/concrete5,hissy/concrete5,deek87/concrete5,haeflimi/concrete5,MrKarlDilkington/concrete5,hissy/concrete5,jaromirdalecky/concrete5,biplobice/concrete5,a3020/concrete5,hissy/concrete5,rikzuiderlicht/concrete5,haeflimi/concrete5,jaromirdalecky/concrete5,mainio/concrete5,MrKarlDilkington/concrete5,olsgreen/concrete5,concrete5/concrete5,deek87/concrete5,mainio/concrete5,concrete5/concrete5,rikzuiderlicht/concrete5,mlocati/concrete5,mlocati/concrete5,mlocati/concrete5,concrete5/concrete5,olsgreen/concrete5,mainio/concrete5,concrete5/concrete5,triplei/concrete5-8,biplobice/concrete5,biplobice/concrete5,rikzuiderlicht/concrete5,triplei/concrete5-8,deek87/concrete5,jaromirdalecky/concrete5,MrKarlDilkington/concrete5,jaromirdalecky/concrete5,mlocati/concrete5,triplei/concrete5-8,deek87/concrete5,haeflimi/concrete5,biplobice/concrete5