misc/bedrust: fix build on powerpc64
Little-endian is misdetected:
/wrkdirs/usr/ports/misc/bedrust/work/bedrust-0.8.8/cargo-crates/aws-lc-sys-0.27.1/aws-lc/crypto/fipsmodule/sha/sha1-altivec.c:107:5: error: call to undeclared function 'vec_vsx_ld'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
107 | vec_vsx_ld(0, (const unsigned char*) data);
| ^
/wrkdirs/usr/ports/misc/bedrust/work/bedrust-0.8.8/cargo-crates/aws-lc-sys-0.27.1/aws-lc/crypto/fipsmodule/sha/sha1-altivec.c:106:30: error: initializing '__vector unsigned char const' (vector of 16 'unsigned char' values) with an expression of incompatible type 'int'
106 | const vector unsigned char unaligned_data =
| ^
107 | vec_vsx_ld(0, (const unsigned char*) data);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.