nettle: always use auxval on ppc, and fix on ppc64 big endian

srcpkgs/nettle/patches/musl-ppc-use-auxval.patch

@@ -0,0 +1,21 @@
+This ensures that efficient capability checks are used on musl.
+
+--- fat-ppc.c
++++ fat-ppc.c
+@@ -42,12 +42,10 @@
+ 
+ #if defined(_AIX)
+ # include <sys/systemcfg.h>
+-#elif defined(__linux__) && defined(__GLIBC__) && defined(__GLIBC_PREREQ)
+-# if __GLIBC_PREREQ(2, 16)
+-#  define USE_GETAUXVAL 1
+-#  include <asm/cputable.h>
+-#  include <sys/auxv.h>
+-# endif
++#elif defined(__linux__)
++# define USE_GETAUXVAL 1
++# include <asm/cputable.h>
++# include <sys/auxv.h>
+ #elif defined(__FreeBSD__)
+ # include <machine/cpu.h>
+ # ifdef PPC_FEATURE2_HAS_VEC_CRYPTO

srcpkgs/nettle/patches/ppc64-elfv2.patch

@@ -0,0 +1,22 @@
+Ensure that ELFv2 ABI is used on all ppc64, including big endian.
+
+--- powerpc64/machine.m4
++++ powerpc64/machine.m4
+@@ -1,7 +1,7 @@
+ define(`PROLOGUE',
+ `.globl C_NAME($1)
+ DECLARE_FUNC(C_NAME($1))
+-ifelse(WORDS_BIGENDIAN,no,
++ifelse(`no',`no',
+ `ifdef(`FUNC_ALIGN',`.align FUNC_ALIGN')
+ C_NAME($1):
+ addis 2,12,(.TOC.-C_NAME($1))@ha
+@@ -17,7 +17,7 @@ ifdef(`FUNC_ALIGN',`.align FUNC_ALIGN')
+ undefine(`FUNC_ALIGN')')
+ 
+ define(`EPILOGUE',
+-`ifelse(WORDS_BIGENDIAN,no,
++`ifelse(`no',`no',
+ `.size C_NAME($1), . - C_NAME($1)',
+ `.size .C_NAME($1), . - .C_NAME($1)
+ .size C_NAME($1), . - .C_NAME($1)')')