configure: Fix glibc multilib build on BE platforms

Author: aleksapaunovic-htec

configure

@@ -4154,7 +4154,12 @@ fi
 
 if test "x$enable_multilib" = xyes
 then :
-  glibc_multilib_names="rv32imac-ilp32 rv32gc-ilp32d rv64imac-lp64 rv64gc-lp64d rv64gcv-lp64d"
+  glibc_multilib_names="rv32imac-ilp32 rv32gc-ilp32d rv64imac-lp64 rv64gc-lp64d"
+  # Vector extension is currently not supported on Big-endian systems. 
+  if test "x$endian" = xlittle
+  then :
+       glibc_multilib_names+=" rv64gcv-lp64d"
+  fi
 
 else $as_nop
   glibc_multilib_names="$with_arch-$with_abi"