Windows: Fix bin_i486 to bin_i686 in build.bash.

windows/build.bash

diff --git a/windows/build.bash b/windows/build.bash
index 3d8fb55..4a6a284 100644
--- a/windows/build.bash
+++ b/windows/build.bash
@@ -134,7 +134,7 @@
 	# 32-bit x86, Win95 or later, using MinGW-w32
 	PATH=$MINGW_W32_DIR/bin:$MINGW_W32_DIR/i686-w64-mingw32/bin:$PATH \
 			buildit \
-			pkg/bin_i486 \
+			pkg/bin_i686 \
 			i686-w64-mingw32 \
 			'-march=i686 -mtune=generic'
 	# 32-bit x86 with SSE2, Win98 or later, using MinGW-w32