LoongArch: include: Add support for tls le relax. Add new relocs number for tls le relax. include/ChangeLog: * elf/loongarch.h: (RELOC_NUMBER (R_LARCH_TLS_LE_HI20_R, 121)): New relocs number. (RELOC_NUMBER (R_LARCH_TLS_LE_ADD_R, 122)): Likewise. (RELOC_NUMBER (R_LARCH_TLS_LE_LO12_R, 123)): Likewise.