Fix ohos-sdk compiler failed

Keep arch/x86_64/bits/float.h in musl_inc_bits_files
Signed-off-by: Nguzhihao4 <guzhihao4@huawei.com>

musl_src.gni

@@ -1750,6 +1750,7 @@ if (musl_arch == "arm") {
   musl_inc_bits_files = [
     "arch/x86_64/bits/fcntl.h",
     "arch/x86_64/bits/fenv.h",
+    "arch/x86_64/bits/float.h",
     "arch/x86_64/bits/posix.h",
     "arch/x86_64/bits/reg.h",
     "arch/x86_64/bits/setjmp.h",