test(ios): workaround swift library link failure

Author: mikehardy

tests/ios/testing.xcodeproj/project.pbxproj

@@ -405,7 +405,10 @@
 				);
 				MARKETING_VERSION = 1.0;
 				ONLY_ACTIVE_ARCH = YES;
-				OTHER_LDFLAGS = "$(inherited)";
+				OTHER_LDFLAGS = (
+					"$(inherited)",
+					"-L$(DEVELOPER_DIR)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/$(PLATFORM_NAME)",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = io.invertase.testing;
 				PRODUCT_NAME = testing;
 				PROVISIONING_PROFILE_SPECIFIER = "";
@@ -442,7 +445,10 @@
 				);
 				MARKETING_VERSION = 1.0;
 				ONLY_ACTIVE_ARCH = YES;
-				OTHER_LDFLAGS = "$(inherited)";
+				OTHER_LDFLAGS = (
+					"$(inherited)",
+					"-L$(DEVELOPER_DIR)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/$(PLATFORM_NAME)",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = io.invertase.testing;
 				PRODUCT_NAME = testing;
 				PROVISIONING_PROFILE_SPECIFIER = "";