Add libvpx build targets for OS X 10.10 Yosemite.

Change-Id: I5baa4405e0b52fd3b6f312bd2dc94b19e6ff3da7
diff --git a/configure b/configure
index f5dd7fc..80149c2 100755
--- a/configure
+++ b/configure
@@ -129,6 +129,7 @@
 all_platforms="${all_platforms} x86-darwin11-gcc"
 all_platforms="${all_platforms} x86-darwin12-gcc"
 all_platforms="${all_platforms} x86-darwin13-gcc"
+all_platforms="${all_platforms} x86-darwin14-gcc"
 all_platforms="${all_platforms} x86-iphonesimulator-gcc"
 all_platforms="${all_platforms} x86-linux-gcc"
 all_platforms="${all_platforms} x86-linux-icc"
@@ -146,6 +147,7 @@
 all_platforms="${all_platforms} x86_64-darwin11-gcc"
 all_platforms="${all_platforms} x86_64-darwin12-gcc"
 all_platforms="${all_platforms} x86_64-darwin13-gcc"
+all_platforms="${all_platforms} x86_64-darwin14-gcc"
 all_platforms="${all_platforms} x86_64-iphonesimulator-gcc"
 all_platforms="${all_platforms} x86_64-linux-gcc"
 all_platforms="${all_platforms} x86_64-linux-icc"
@@ -162,6 +164,7 @@
 all_platforms="${all_platforms} universal-darwin11-gcc"
 all_platforms="${all_platforms} universal-darwin12-gcc"
 all_platforms="${all_platforms} universal-darwin13-gcc"
+all_platforms="${all_platforms} universal-darwin14-gcc"
 all_platforms="${all_platforms} generic-gnu"
 
 # all_targets is a list of all targets that can be configured