Added BITCODE_GENERATION_MODE user defined setting to tvOS framework target.

Alamofire.xcodeproj/project.pbxproj

@@ -1051,6 +1051,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				APPLICATION_EXTENSION_API_ONLY = YES;
+				BITCODE_GENERATION_MODE = bitcode;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
@@ -1074,6 +1075,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				APPLICATION_EXTENSION_API_ONLY = YES;
+				BITCODE_GENERATION_MODE = bitcode;
 				COPY_PHASE_STRIP = NO;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				DEFINES_MODULE = YES;