Adjust AEGIS code for Android

Author: utelle

src/aegis/common/common.h

@@ -24,7 +24,11 @@
 #    if __ANDROID_API__ < 18
 #        undef HAVE_GETAUXVAL
 #    endif
-#    define HAVE_ANDROID_GETCPUFEATURES
+#    if defined(__clang__) || defined(__GNUC__)
+#        if __has_include(<cpu-features.h>)
+#            define HAVE_ANDROID_GETCPUFEATURES
+#        endif
+#    endif
 #endif
 #if defined(__i386__) || defined(_M_IX86) || defined(__x86_64__) || defined(_M_X64) || defined(_M_AMD64)