Fix compile on all big endian related to innodb:ut_crc32_swap_byteorder

Move function ut_crc32_swap_byteorder to a non-x86 #ifdef area.

As its only used in BIGENDIAN, use #ifdefs around
ut_crc32_swap_byteorder.

Travis CI and Debian both include s390x in builds/test, which is big endian.

Fixes commit: 1312b4eb

storage/innobase/ut/ut0crc32.cc

@@ -215,21 +215,6 @@ ut_crc32_64_low_hw(
 	return(static_cast<uint32_t>(crc_64bit));
 }
 
-/** Swap the byte order of an 8 byte integer.
-@param[in]	i	8-byte integer
-@return 8-byte integer */
-inline uint64_t ut_crc32_swap_byteorder(uint64_t i)
-{
-  return i << 56 |
-    (i & 0x000000000000FF00ULL) << 40 |
-    (i & 0x0000000000FF0000ULL) << 24 |
-    (i & 0x00000000FF000000ULL) << 8 |
-    (i & 0x000000FF00000000ULL) >> 8 |
-    (i & 0x0000FF0000000000ULL) >> 24 |
-    (i & 0x00FF000000000000ULL) >> 40 |
-    i >> 56;
-}
-
 /** Calculate CRC32 over 64-bit byte string using a hardware/CPU instruction.
 @param[in,out]	crc	crc32 checksum so far when this function is called,
 when the function ends it will contain the new checksum
@@ -405,6 +390,23 @@ ut_crc32_8_sw(
 	(*len)--;
 }
 
+/** Swap the byte order of an 8 byte integer.
+@param[in]	i	8-byte integer
+@return 8-byte integer */
+# ifdef WORDS_BIGENDIAN
+inline uint64_t ut_crc32_swap_byteorder(uint64_t i)
+{
+  return i << 56 |
+    (i & 0x000000000000FF00ULL) << 40 |
+    (i & 0x0000000000FF0000ULL) << 24 |
+    (i & 0x00000000FF000000ULL) << 8 |
+    (i & 0x000000FF00000000ULL) >> 8 |
+    (i & 0x0000FF0000000000ULL) >> 24 |
+    (i & 0x00FF000000000000ULL) >> 40 |
+    i >> 56;
+}
+# endif /* WORDS_BIGENDIAN */
+
 /** Calculate CRC32 over a 64-bit integer using a software implementation.
 @param[in]	crc	crc32 checksum so far
 @param[in]	data	data to be checksummed