Fix armv3 compile error
* mpi/longlong.h [__arm__ && __ARM_ARCH < 4] (umul_ppmm): Use __AND_CLOBBER_CC instead of __CLOBBER_CC.
ARMv3 code uses CLOBBER_CC at the end of clobber list while it should have
been AND_CLOBBER_CC.
[jk: add changelog, rebase on libgcrypt repository]
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>