v0.5.5 fix sccache bug for dwo file generate
when output dir changed, and -g -gsplit-dwarf is enabled, new object file should be gererated, but not old cached object.
case:
1 echo "int test(){}" > test.cc
2 mkdir o1 o2
3 sccache -c -g -gsplit-dwarf test.cc -o o1/test.o
4 sccache -z
5 sccache -c -g -gsplit-dwarf test.cc -o o2/test.o
6 strings o2/test.o |grep o2/test.dwo
Full Changelog: v0.5.4...v0.5.5