Really add shared scheme

Author: tokyovigilante

projects/xcode5/glsl_optimizer_lib.xcodeproj/project.pbxproj

@@ -939,7 +939,7 @@
 		08FB7793FE84155DC02AAC07 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0500;
+				LastUpgradeCheck = 0700;
 				TargetAttributes = {
 					9429935E1B1DB6E20095A86F = {
 						CreatedOnToolsVersion = 6.3.2;
@@ -1244,6 +1244,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				CLANG_ENABLE_MODULES = YES;
+				ENABLE_TESTABILITY = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_OPTIMIZATION_LEVEL = 0;
 				GCC_WARN_ABOUT_MISSING_FIELD_INITIALIZERS = YES;