* config.m4.in (ASM_ALIGN_LOG): Substitute.

* configure.ac (ASM_ALIGN_LOG): Check if .align directive is
logarithmic.
* asm.m4 (ALIGN): New macro. Takes a logarithmic argument, and
expands to a .align directive.

Rev: src/nettle/asm.m4:1.16
Rev: src/nettle/config.m4.in:1.6