[libc] Enable stdfix functions for macOS arm64 targets. (#132674)

Fixes #132673 

Added ```libc.src.stdfix.*``` into
```libc/config/darwin/arm/entrypoints.txt```.

All tests related to ```stdfix``` has passed.

Author: kr-2003

libc/config/darwin/arm/entrypoints.txt

@@ -268,6 +268,76 @@ set(TARGET_LIBM_ENTRYPOINTS
     libc.src.math.truncl
 )
 
+if(LIBC_COMPILER_HAS_FIXED_POINT)
+  list(APPEND TARGET_LIBM_ENTRYPOINTS
+    # stdfix.h _Fract and _Accum entrypoints
+    libc.src.stdfix.abshk
+    libc.src.stdfix.abshr
+    libc.src.stdfix.absk
+    libc.src.stdfix.abslk
+    libc.src.stdfix.abslr
+    libc.src.stdfix.absr
+    libc.src.stdfix.exphk
+    libc.src.stdfix.expk
+    libc.src.stdfix.roundhk
+    libc.src.stdfix.roundhr
+    libc.src.stdfix.roundk
+    libc.src.stdfix.roundlk
+    libc.src.stdfix.roundlr
+    libc.src.stdfix.roundr
+    libc.src.stdfix.rounduhk
+    libc.src.stdfix.rounduhr
+    libc.src.stdfix.rounduk
+    libc.src.stdfix.roundulk
+    libc.src.stdfix.roundulr
+    libc.src.stdfix.roundur
+    libc.src.stdfix.sqrtuhk
+    libc.src.stdfix.sqrtuhr
+    libc.src.stdfix.sqrtuk
+    libc.src.stdfix.sqrtur
+    # libc.src.stdfix.sqrtulk
+    libc.src.stdfix.sqrtulr
+    libc.src.stdfix.uhksqrtus
+    libc.src.stdfix.uksqrtui
+    libc.src.stdfix.hrbits
+    libc.src.stdfix.uhrbits
+    libc.src.stdfix.rbits
+    libc.src.stdfix.urbits
+    libc.src.stdfix.lrbits
+    libc.src.stdfix.ulrbits
+    libc.src.stdfix.hkbits
+    libc.src.stdfix.uhkbits
+    libc.src.stdfix.kbits
+    libc.src.stdfix.ukbits
+    libc.src.stdfix.lkbits
+    libc.src.stdfix.ulkbits
+    libc.src.stdfix.bitshr
+    libc.src.stdfix.bitsr
+    libc.src.stdfix.bitslr
+    libc.src.stdfix.bitshk
+    libc.src.stdfix.bitsk
+    libc.src.stdfix.bitslk
+    libc.src.stdfix.bitsuhr
+    libc.src.stdfix.bitsur
+    libc.src.stdfix.bitsulr
+    libc.src.stdfix.bitsuhk
+    libc.src.stdfix.bitsuk
+    libc.src.stdfix.bitsulk
+    libc.src.stdfix.countlshr
+    libc.src.stdfix.countlsr
+    libc.src.stdfix.countlslr
+    libc.src.stdfix.countlshk
+    libc.src.stdfix.countlsk
+    libc.src.stdfix.countlslk
+    libc.src.stdfix.countlsuhr
+    libc.src.stdfix.countlsur
+    libc.src.stdfix.countlsulr
+    libc.src.stdfix.countlsuhk
+    libc.src.stdfix.countlsuk
+    libc.src.stdfix.countlsulk
+  )
+endif()
+
 set(TARGET_LLVMLIBC_ENTRYPOINTS
   ${TARGET_LIBC_ENTRYPOINTS}
   ${TARGET_LIBM_ENTRYPOINTS}