Bug 715397 - ability to build m-c on 10.7 (lion). r=ted.

Use the 10.6 sdk.

build/macosx/mozconfig.leopard

@@ -29,4 +29,4 @@ fi
 
 # Note, the version (10) is used by libffi's configure.
 ac_add_options --target=i386-apple-darwin10
-ac_add_options --with-macos-sdk=/Developer/SDKs/MacOSX10.5.sdk
+ac_add_options --with-macos-sdk=/Developer/SDKs/MacOSX10.6.sdk

build/macosx/universal/mozconfig.common

@@ -42,8 +42,7 @@ mk_add_options MOZ_POSTFLIGHT_ALL+=build/macosx/universal/flight.mk
 ac_add_app_options i386 --target=i386-apple-darwin10
 ac_add_app_options x86_64 --target=x86_64-apple-darwin10
 
-ac_add_app_options i386 --with-macos-sdk=/Developer/SDKs/MacOSX10.5.sdk
-ac_add_app_options x86_64 --with-macos-sdk=/Developer/SDKs/MacOSX10.6.sdk
+ac_add_options --with-macos-sdk=/Developer/SDKs/MacOSX10.6.sdk
 
 . $topsrcdir/build/macosx/common