Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
Turn off default generation of userland dot symbols on powerpc64 now thatwe have a binutils that supports it. Kernel dot symbols remain on to assistDDB.
Mark assembler sources from libc as working with non-executable stack.Reviewed and tested by: nwhitehorn
Provide 64-bit PowerPC support in libc.Obtained from: projects/ppc64