Mac OS X: Fixed typo in build script comment.

build-scripts/g++-fat.sh

@@ -6,7 +6,7 @@
 
 DEVELOPER="`xcode-select -print-path`/Platforms/MacOSX.platform/Developer"
 
-# Intel 32-bit compiler flags (10.6 runtime compatibility)
+# Intel 32-bit compiler flags (10.5 runtime compatibility)
 GCC_COMPILE_X86="g++ -arch i386 -mmacosx-version-min=10.5 \
 -I/usr/local/include"