lto: disable LTO for e2fsprogs

lto: disable LTO for e2fsprogs

Fat LTO objects embed original source paths in .gnu.lto_* IR sections
which are not remapped by -ffile-prefix-map. This causes buildpaths QA
failures for libss.a and libext2fs.a in the e2fsprogs-staticdev package.

Disable LTO for e2fsprogs to prevent TMPDIR references from leaking into
the installed static libraries.

Signed-off-by: Thomas Perrot <thomas.perrot@bootlin.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>