[X86[] fp128-libcalls-strict.ll - add missing fp80 libm declarations for completeness

Noticed while reviewing #110760

Author: RKSimon

llvm/test/CodeGen/X86/fp128-libcalls-strict.ll

@@ -1926,7 +1926,9 @@ declare fp128 @llvm.experimental.constrained.fdiv.f128(fp128, fp128, metadata, m
 declare fp128 @llvm.experimental.constrained.fma.f128(fp128, fp128, fp128, metadata, metadata)
 declare fp128 @llvm.experimental.constrained.frem.f128(fp128, fp128, metadata, metadata)
 declare fp128 @llvm.experimental.constrained.ceil.f128(fp128, metadata)
+declare fp128 @llvm.experimental.constrained.acos.f128(fp128, metadata, metadata)
 declare fp128 @llvm.experimental.constrained.cos.f128(fp128, metadata, metadata)
+declare fp128 @llvm.experimental.constrained.cosh.f128(fp128, metadata, metadata)
 declare fp128 @llvm.experimental.constrained.exp.f128(fp128, metadata, metadata)
 declare fp128 @llvm.experimental.constrained.exp2.f128(fp128, metadata, metadata)
 declare fp128 @llvm.experimental.constrained.floor.f128(fp128, metadata)
@@ -1941,9 +1943,13 @@ declare fp128 @llvm.experimental.constrained.powi.f128(fp128, i32, metadata, met
 declare fp128 @llvm.experimental.constrained.rint.f128(fp128, metadata, metadata)
 declare fp128 @llvm.experimental.constrained.round.f128(fp128, metadata)
 declare fp128 @llvm.experimental.constrained.roundeven.f128(fp128, metadata)
+declare fp128 @llvm.experimental.constrained.asin.f128(fp128, metadata, metadata)
 declare fp128 @llvm.experimental.constrained.sin.f128(fp128, metadata, metadata)
+declare fp128 @llvm.experimental.constrained.sinh.f128(fp128, metadata, metadata)
 declare fp128 @llvm.experimental.constrained.sqrt.f128(fp128, metadata, metadata)
+declare fp128 @llvm.experimental.constrained.atan.f128(fp128, metadata, metadata)
 declare fp128 @llvm.experimental.constrained.tan.f128(fp128, metadata, metadata)
+declare fp128 @llvm.experimental.constrained.tanh.f128(fp128, metadata, metadata)
 declare fp128 @llvm.experimental.constrained.trunc.f128(fp128, metadata)
 declare i32 @llvm.experimental.constrained.lrint.i32.f128(fp128, metadata, metadata)
 declare i64 @llvm.experimental.constrained.llrint.i64.f128(fp128, metadata, metadata)