[test]For ThinLTO icp test, require llvm-64-bit given the raw profile data is generated on 64-bit systems (#76005)

Author: mingmingl-llvm

llvm/test/Transforms/PGOProfile/thinlto_indirect_call_promotion.ll

@@ -10,6 +10,8 @@
 ; be built with zlib support to decompress them.
 ; REQUIRES: zlib
 ; REQUIRES: host-byteorder-little-endian
+; Raw profiles are generate on 64-bit systems.
+; REQUIRES: llvm-64-bits
 
 ; RUN: rm -rf %t && split-file %s %t && cd %t