[Liftoff]MIPS[64]: Fix RunWasmLiftoff_Int32Clz test failing

Change-Id: I2590121275b83cc564c5e9041e25eb94f4cd5839
Reviewed-on: https://chromium-review.googlesource.com/918722Reviewed-by: Sreten Kovacevic <sreten.kovacevic@mips.com>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Sreten Kovacevic <sreten.kovacevic@mips.com>
Cr-Commit-Position: refs/heads/master@{#51294}

src/wasm/baseline/mips/liftoff-assembler-mips.h

@@ -140,7 +140,7 @@ void LiftoffAssembler::FillI64Half(Register, uint32_t half_index) {
 #define UNIMPLEMENTED_GP_UNOP(name)                                \
   bool LiftoffAssembler::emit_##name(Register dst, Register src) { \
     BAILOUT("gp unop");                                            \
-    return false;                                                  \
+    return true;                                                   \
   }
 #define UNIMPLEMENTED_FP_BINOP(name)                                         \
   void LiftoffAssembler::emit_##name(DoubleRegister dst, DoubleRegister lhs, \

src/wasm/baseline/mips64/liftoff-assembler-mips64.h

@@ -135,7 +135,7 @@ void LiftoffAssembler::FillI64Half(Register, uint32_t half_index) {
 #define UNIMPLEMENTED_GP_UNOP(name)                                \
   bool LiftoffAssembler::emit_##name(Register dst, Register src) { \
     BAILOUT("gp unop");                                            \
-    return false;                                                  \
+    return true;                                                   \
   }
 #define UNIMPLEMENTED_FP_BINOP(name)                                         \
   void LiftoffAssembler::emit_##name(DoubleRegister dst, DoubleRegister lhs, \