[BOLT][AArch64] Fix LDR relocation type in ADRP+LDR sequence (#166391)
`R_AARCH64_ADD_ABS_LO12_NC` is for the `ADD` instruction in the
`ADRP+ADD` sequence. For `ADRP+LDR` sequence generated in LDR
relaxation, relocation type for `LDR` should be
`R_AARCH64_LDST64_ABS_LO12_NC` if it is 64-bit integer load or
`R_AARCH64_LDST32_ABS_LO12_NC` if 32-bit.
Sorry should have included this in #165787.