no edit summary
* I committed the changes and run "git format-patch master --stdout > gcc49-makefile.patch" command to get the patch for my changes.
* I copied "gcc49-makefile.patch" to "~/rpmbuild/SOURCES/"
edited "~/rpmbuild/SPECS/gcc.spec" in the next way:
* I run "export RPM_PACKAGER="Artem Luzyanin <email@example.com>""
* I run "rpmdev-bumpspec -c "This patch is to create ilp32-capable gcc in a separate tree."" command to add the changes with comments to the spec file.