Fix build with libc++ 3.8.0 by removing conflicting re-definition of abs().

PR:		209612
Submitted by:	dim

games/trackballs/files/patch-src_glHelp.cc

@@ -0,0 +1,10 @@
+--- src/glHelp.cc.orig	2007-04-07 13:15:09 UTC
++++ src/glHelp.cc
+@@ -129,7 +129,6 @@ void drawSurface(SDL_Surface *surface,in
+   // why is this removed? should it not be done???
+   glDeleteTextures(1,&texture);  
+ }
+-inline Real abs(Real v) {return v>0.0?v:-v;}
+ double mousePointerPhase=0.0;
+ 
+ void tickMouse(Real td) {

games/trackballs/files/patch-src_menuMode.cc

@@ -0,0 +1,10 @@
+--- src/menuMode.cc.orig	2007-04-07 13:16:26 UTC
++++ src/menuMode.cc
+@@ -163,7 +163,6 @@ void MenuMode::doSelection() {
+   case MENU_EDITOR: GameMode::activate(EditMode::editMode); break;
+   }
+ }
+-inline Real abs(Real v) {return v>0.0?v:-v;}
+ 
+ void MenuMode::idle(Real td) {
+   int w,h,i,x,y;