Switch to optimized ffsl supported on more platforms

In file included from Source/GmmLib/TranslationTable/GmmAuxTable.cpp:30:
Source/GmmLib/TranslationTable/../TranslationTable/GmmUmdTranslationTable.h: In function ‘int _BitScanForward(uint32_t*, uint32_t)’:
Source/GmmLib/TranslationTable/../TranslationTable/GmmUmdTranslationTable.h:63:9: error: ‘ffsl’ was not declared in this scope
     i = ffsl(mask);
         ^~~~
Source/GmmLib/TranslationTable/../TranslationTable/GmmUmdTranslationTable.h:63:9: note: suggested alternative: ‘ffs’
     i = ffsl(mask);
         ^~~~
         ffs

Source/GmmLib/TranslationTable/GmmUmdTranslationTable.h

@@ -60,12 +60,7 @@ static inline int _BitScanForward(uint32_t *index, uint32_t mask)
 {
     int i;
 
-#ifdef __ANDROID__
-    i = ffs(mask);
-#else
-    i = ffsl(mask);
-#endif
-
+    i = __builtin_ffsl(mask);
     if(i > 0)
     {
         *index = (uint32_t)(i - 1);