"perm +" notation deprecated in newer "find"

Newer versions of the "find" utility have deprecated the following notation:

    -perm +111

and replaced it with:

    -perm /111

Please consider applying the following patch to build-toolchain.sh:

--- gcc-arm-none-eabi-4_9-2015q3-20150921.ORIG/build-toolchain.sh 2015-07-09 08:06:25.722378574 -0400
+++ gcc-arm-none-eabi-4_9-2015q3-20150921/build-toolchain.sh 2015-07-09 00:25:29.843937932 -0400
@@ -591,7 +591,7 @@
         strip_binary strip $bin
     done

- STRIP_BINARIES=`find $INSTALLDIR_NATIVE/lib/gcc/arm-none-eabi/$GCC_VER/ -maxdepth 1 -name \* -perm +111 -and ! -type d`
+ STRIP_BINARIES=`find $INSTALLDIR_NATIVE/lib/gcc/arm-none-eabi/$GCC_VER/ -maxdepth 1 -name \* -perm /111 -and ! -type d`
     for bin in $STRIP_BINARIES ; do
         strip_binary strip $bin
     done