build: rename " and "" to quote1 and quote2 for hg

They'll be copied back during installation
but then hg doesn't have to create those files
on systems that have trouble with them.

TBR=rsc
https://codereview.appspot.com/105800043

INSTALL

diff --git a/INSTALL b/INSTALL
index 5b86645..f032f9d 100755
--- a/INSTALL
+++ b/INSTALL
@@ -170,6 +170,10 @@
 		echo " "
 		echo "* Warning: not all binaries built successfully."
 	fi
+	if [ -f bin/quote1 ]; then
+		cp bin/quote1 'bin/"'
+		cp bin/quote2 'bin/""'
+	fi
 	echo "* Cleaning up..."
 	mk clean
 fi

bin/quote1

diff --git "a/bin/\"" b/bin/quote1
similarity index 100%
rename from "bin/\""
rename to bin/quote1

bin/quote2

diff --git "a/bin/\"\"" b/bin/quote2
similarity index 100%
rename from "bin/\"\""
rename to bin/quote2