[gn] "port" 5efce7392f (arm 32-bit asm compiler-rt)

compiler-rt/lib/builtins/CMakeLists.txt

@@ -446,7 +446,8 @@ if(COMPILER_RT_ARM_OPTIMIZED_FP AND BUILTIN_SUPPORTED_ARCH MATCHES "arm")
   if(implicit_it_flag)
     set(assembly_files
       arm/mulsf3.S
-      arm/divsf3.S)
+      arm/divsf3.S
+      )
     set_source_files_properties(${assembly_files}
       PROPERTIES COMPILE_OPTIONS ${implicit_it_flag})
     set(arm_or_thumb2_optimized_fp_SOURCES

llvm/utils/gn/secondary/compiler-rt/lib/builtins/BUILD.gn

@@ -96,5 +96,11 @@ source_set("_unused") {
     "arm/comparesf2.S",
     "arm/divsi3.S",
     "arm/udivsi3.S",
+    "arm/fnan2.c",
+    "arm/fnorm2.c",
+    "arm/funder.c",
+    "arm/mulsf3.S",
+    "arm/divsf3.S",
+    "arm/thumb1/mulsf3.S",
   ]
 }