Fix coverage build issue.

Author: hzalaz

Example/A0SimpleKeychain.xcodeproj/project.pbxproj

@@ -493,6 +493,8 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
+				GCC_GENERATE_TEST_COVERAGE_FILES = YES;
+				GCC_INSTRUMENT_PROGRAM_FLOW_ARCS = YES;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "A0SimpleKeychain/A0SimpleKeychain-Prefix.pch";
 				INFOPLIST_FILE = "A0SimpleKeychain/A0SimpleKeychain-Info.plist";
@@ -527,6 +529,8 @@
 					"$(inherited)",
 					"$(DEVELOPER_FRAMEWORKS_DIR)",
 				);
+				GCC_GENERATE_TEST_COVERAGE_FILES = YES;
+				GCC_INSTRUMENT_PROGRAM_FLOW_ARCS = YES;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "Tests/Tests-Prefix.pch";
 				GCC_PREPROCESSOR_DEFINITIONS = (
@@ -550,6 +554,8 @@
 					"$(inherited)",
 					"$(DEVELOPER_FRAMEWORKS_DIR)",
 				);
+				GCC_GENERATE_TEST_COVERAGE_FILES = YES;
+				GCC_INSTRUMENT_PROGRAM_FLOW_ARCS = YES;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "Tests/Tests-Prefix.pch";
 				INFOPLIST_FILE = "Tests/Tests-Info.plist";