[Opus] Update to v1.2.1

third_party/opus/src/celt/arm/fixed_armv4.h

Index: third_party/opus/src/celt/arm/fixed_armv4.h
diff --git a/third_party/opus/src/celt/arm/fixed_armv4.h b/third_party/opus/src/celt/arm/fixed_armv4.h
index efb3b1896a866b1d5ec861fedbb334575a464c4d..d84888a772acf9b8534b8e030f204189dffe748c 100644
--- a/third_party/opus/src/celt/arm/fixed_armv4.h
+++ b/third_party/opus/src/celt/arm/fixed_armv4.h
@@ -37,7 +37,7 @@ static OPUS_INLINE opus_val32 MULT16_32_Q16_armv4(opus_val16 a, opus_val32 b)
       "#MULT16_32_Q16\n\t"
       "smull %0, %1, %2, %3\n\t"
       : "=&r"(rd_lo), "=&r"(rd_hi)
-      : "%r"(b),"r"(a<<16)
+      : "%r"(b),"r"(SHL32(a,16))
   );
   return rd_hi;
 }
@@ -54,10 +54,10 @@ static OPUS_INLINE opus_val32 MULT16_32_Q15_armv4(opus_val16 a, opus_val32 b)
       "#MULT16_32_Q15\n\t"
       "smull %0, %1, %2, %3\n\t"
       : "=&r"(rd_lo), "=&r"(rd_hi)
-      : "%r"(b), "r"(a<<16)
+      : "%r"(b), "r"(SHL32(a,16))
   );
   /*We intentionally don't OR in the high bit of rd_lo for speed.*/
-  return rd_hi<<1;
+  return SHL32(rd_hi,1);
 }
 #define MULT16_32_Q15(a, b) (MULT16_32_Q15_armv4(a, b))