GCC for PowerPC does not align  .note sections to 4 bytes.  When
running ctfmerge on its objects, libelf asserts as it expects
.note sections to be 4-byte aligned.  Change that expectation.

Approved by:	jkoshy@
Obtained from:	Juniper Networks, Inc.


git-svn-id: svn+ssh://svn.freebsd.org/base/head@273442 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f