.checkpackageignore: stop ignoring ShellCheck issues in google-breakpad

The issues have been fixed by commit
f1089391a83aa63b6977e65970451365f10dc66a ("package/google-breakpad/gen-syms.sh:
fix shellcheck warnings")

Fixes:

  https://gitlab.com/buildroot.org/buildroot/-/jobs/5815132933

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 9212a719a5c3078048737d56596442e5ac7120a4)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

.checkpackageignore

@@ -61,7 +61,6 @@ package/gamin/0002-no-const-return.patch Sob
 package/gcc/arc-2020.09-release/0002-libsanitizer-Remove-cyclades-from-libsanitizer.patch Sob
 package/genromfs/0001-build-system.patch Sob
 package/gerbera/S99gerbera Indent
-package/google-breakpad/gen-syms.sh Shellcheck
 package/gpsd/S50gpsd Indent Shellcheck Variables
 package/haveged/S21haveged Shellcheck Variables
 package/htpdate/S43htpdate Shellcheck