Sanitizer/MIPS: Use $t9 for preemptible function call

Sanitizer/MIPS: Use $t9 for preemptible function call

Currently, almost all of the shared libraries of MIPS, rely on $t9
to get the address of current function, instead of PCREL instructions,
even on MIPSr6. So we have to set $t9 properly.

To get the address of preemptible function, we need the help of GOT.
MIPS/O32 has .cpload, which can help to generate 3 instructions to get GOT.
For __mips64, we can get GOT by:

lui $t8, %hi(%neg(%gp_rel(SANITIZER_STRINGIFY(TRAMPOLINE(func)))))
daddu $t8, $t8, $t9
daddiu $t8, $t8, %hi(%neg(%gp_rel(SANITIZER_STRINGIFY(TRAMPOLINE(func)))))

And then get the address of __interceptor_func, and jump to it

ld $t9, %got_disp(_interceptor" SANITIZER_STRINGIFY(func) ")($t8)
jr $t9

Upstream-Commit: 0a64367a72f1634321f5051221f05f2f364bd882

libsanitizer

	* interception/interception.h (substitution_##func_name):
	Use macro C_ASM_TAIL_CALL.
	* sanitizer_common/sanitizer_asm.h: Define C_ASM_TAIL_CALL
	for MIPS with help of t9.