config: Enable Debuginfod RPM sig checking and eu-stacktrace in spec

config: Enable Debuginfod RPM sig checking and eu-stacktrace in spec

For testing that the eu-stacktrace and debuginfod ima verification
code builds correctly explicitly add --enable-stacktrace and
--enable-debuginfod-ima-verification to configure.

	 * config/elfutils.spec.in (enable_stacktrace): New global,
         depends on arch.
	 (BuildRequires): Add sysprof-capture-devel.
	 (configure): Add --enable-stacktrace and
	 --enable-debuginfod-ima-verification.
	 (files): Add eu-stacktrace.

Signed-off-by: Mark Wielaard <mark@klomp.org>