Remove GCC -no-strict-aliasing compiler flag.

GCC typically generates better code without the -no-strict-aliasing flag.
It is only required if code makes assumptiosn that break strict aliasing.
The unit tests pass on x86 and Tile without the flag.

configure.ac

@@ -69,7 +69,7 @@
                 CFLAGS="$CFLAGS -W"
         fi
     fi
-    CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
+    CFLAGS="$CFLAGS -Wall"
     CFLAGS="$CFLAGS -Wno-unused-parameter"
     CFLAGS="$CFLAGS -std=gnu99"