a34ae9cfcf
When TargetID is supported, the isa name will contain ':' characters
that are not legal in Windows file names. So replace all
non-aphanumeric or '+'/'-' characters with '_' to ensure the file name
will be legal on any file system.
Change-Id: I0b73a6188c186f75f1d2e8af19ade87667cbfe0b
[ROCm/clr commit: ed6d54b416]