- powerpc and powerpc64: add -mpower8-vector to fix
  ./sha256-ppc.c:294:8: warning: call to undeclared function 'vec_mergeo'

Index: cipher/Makefile.in
--- cipher/Makefile.in.orig
+++ cipher/Makefile.in
@@ -667,7 +667,7 @@ EXTRA_libcipher_la_SOURCES = \
 @ENABLE_INSTRUMENTATION_MUNGING_TRUE@	-e 's/-fcoverage[=,\-][=,a-z,A-Z,0-9,\,,\-]*//g'
 
 @ENABLE_PPC_VCRYPTO_EXTRA_CFLAGS_FALSE@ppc_vcrypto_cflags = 
-@ENABLE_PPC_VCRYPTO_EXTRA_CFLAGS_TRUE@ppc_vcrypto_cflags = -O2 -maltivec -mvsx -mcrypto
+@ENABLE_PPC_VCRYPTO_EXTRA_CFLAGS_TRUE@ppc_vcrypto_cflags = -O2 -maltivec -mvsx -mcrypto -mpower8-vector
 @ENABLE_AARCH64_NEON_INTRINSICS_EXTRA_CFLAGS_FALSE@aarch64_crypto_cflags = 
 @ENABLE_AARCH64_NEON_INTRINSICS_EXTRA_CFLAGS_TRUE@aarch64_crypto_cflags = -O2 -march=armv8-a+simd+crypto
 @ENABLE_AARCH64_NEON_INTRINSICS_EXTRA_CFLAGS_FALSE@aarch64_simd_cflags = 
