MFC r252325:

MFC r252325:
The dtmalloc provider uses the short description of a malloc type as the
function name of its corresponding DTrace probes. These descriptions may
contain whitespace, but probe names cannot, so just replace any whitespace
with underscores when creating probes.

git-svn-id: svn://svn.freebsd.org/base/stable/9@252860 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f