[Bug testsuite/108192] g++.dg/cet-notrack-1.C searching for wrong function on mingw

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108192

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Since Windows doesn't support IBT, this test can be limited to Linux.