chuck: fix OS X version detection regex for 10.10

Fixes Homebrew/homebrew#34189.
Closes Homebrew/homebrew#34192.

Formula/chuck.rb

@@ -7,6 +7,7 @@ class Chuck < Formula
 
   # Homebrew already takes care of setting the sysroot;
   # also lets the build work on CLT.
+  # Also fixes the version regex for 10.10+; reported to chuck-dev.
   patch :DATA
 
   def install
@@ -18,15 +19,17 @@ end
 
 __END__
 diff --git a/src/makefile.osx b/src/makefile.osx
-index 4531ee1..cd4a910 100644
+index 4531ee1..65cee97 100644
 --- a/src/makefile.osx
 +++ b/src/makefile.osx
-@@ -2,8 +2,6 @@
+@@ -1,9 +1,7 @@
+ # uncomment the following to force 32-bit compilation
  # FORCE_M32=-m32
  
- ifneq ($(shell sw_vers -productVersion | egrep '10\.[6789](\.[0-9]+)?'),)
+-ifneq ($(shell sw_vers -productVersion | egrep '10\.[6789](\.[0-9]+)?'),)
 -SDK=$(shell xcodebuild -sdk macosx -version | grep '^Path:' | sed 's/Path: \(.*\)/\1/')
 -ISYSROOT=-isysroot $(SDK)
++ifneq ($(shell sw_vers -productVersion | egrep '10\.([6789]|1[0-9]+)(\.[0-9]+)?'),)
  LINK_EXTRAS=-F/System/Library/PrivateFrameworks \
      -weak_framework MultitouchSupport
  else