osx: /usr/local files are not system libraries

Anything in /usr/local has been installed locally and is not part of the
OS. In particular, Homebrew installs packages into /usr/local; if we
want to bundle libraries from Homebrew then these need to be excluded
from the /usr pattern immediately below.

Author: fragglet

pkg/osx/cp-with-libs

@@ -27,6 +27,9 @@ is_sys_lib() {
 		/System/*)
 			true
 			;;
+		/usr/local/*)  # homebrew/manual install
+			false
+			;;
 		/usr/*)
 			true
 			;;
@@ -54,7 +57,7 @@ install_with_deps() {
 
 	if [ -e "$dest_file" ]; then
 		return
-	fi	
+	fi
 
 	echo "Installing $bin_name..."