testsuite: Use -fno-report-bug in gcc.dg/plugin/
Certain downstream compilers (for example, in Fedora) default to
-freport-bug. The extra output breaks the following tests. We can use
-fno-report-bug to fix that. Patch verified with:
$ make check RUNTESTFLAGS='--target_board=unix\{,-freport-bug\} plugin.exp'
gcc/testsuite/ChangeLog:
* gcc.dg/plugin/crash-test-ice-sarif.c: Use -fno-report-bug. Adjust
scan-sarif-file.
* gcc.dg/plugin/crash-test-ice-stderr.c: Use -fno-report-bug.
* gcc.dg/plugin/crash-test-write-though-null-sarif.c: Use
-fno-report-bug. Adjust scan-sarif-file.
* gcc.dg/plugin/crash-test-write-though-null-stderr.c: Use
-fno-report-bug.