patchelf: Fix note section alignment issues

Improve note section normalization was added to patchelf in recent versions
however if fails if there are two note sections which aren't sized to match
section alignment. Tweak the code to account for section alignment.

This fixes patchelf failures on the autobuilder, particularly to ccache-native.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>