package/supertux: fix 'according' typo in help text

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
(cherry picked from commit b55759c516b6f18f30b9e0bd185b414c56a62df8)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/supertux/supertux.mk

@@ -58,7 +58,7 @@ endif
 # context-sensitive by cpp.  SDL_cpuinfo.h is included by SDL.h.
 # Including altivec.h makes arbitrary code break."
 #
-# Acording to a bug report in GCC [1]:
+# According to a bug report in GCC [1]:
 # "You need to use -std=g++11 or undefine bool after the include of altivec.h
 # as context sensitive keywords is not part of the C++11 standard".
 # So use gnu++11 instead of c++11 only for altivec system.