Enable bitcode (Fix #20)

Apple recommends it to be YES

Author: brunolemos

ios/OAuthManager.xcodeproj/project.pbxproj

@@ -275,7 +275,7 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
 				EMBEDDED_CONTENT_CONTAINS_SWIFT = NO;
-				ENABLE_BITCODE = NO;
+				ENABLE_BITCODE = YES;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;
@@ -328,7 +328,7 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = YES;
 				EMBEDDED_CONTENT_CONTAINS_SWIFT = NO;
-				ENABLE_BITCODE = NO;
+				ENABLE_BITCODE = YES;
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;