port: rename some math functions to avoid conflicts with libc

src/include/game/acosasin.h

@@ -4,7 +4,7 @@
 #include "data.h"
 #include "types.h"
 
-u16 acos(s16 arg0);
-s16 asin(s16 arg0);
+u16 acosx(s16 arg0);
+s16 asinx(s16 arg0);
 
 #endif

src/include/game/ceil.h

@@ -5,6 +5,6 @@
 #include "types.h"
 
 f32 ceilf(f32 value);
-s32 ceil(f32 value);
+s32 ceiltoint(f32 value);
 
 #endif

src/include/game/floor.h

@@ -5,6 +5,6 @@
 #include "types.h"
 
 f32 floorf(f32 value);
-s32 floor(f32 value);
+s32 floortoint(f32 value);
 
 #endif