Add .x as XDR/RPCGEN (#3472)

* Add .x as XDR/RPCGEN

XDR/RPC language as documented in RFC5531, RFC4506.
Samples are from glibc and RFCs.

* Add Logos samples

https://github.com/JonasGessner/NoCarrier/blob/master/NoCarrier.x - MIT
cf31f4e466/llvm-gcc-R3/gcc/testsuite/objc/execute/string1.x - GPL2
f6415578fa/perapp-plugin/Tweak.x - GPL3
d1b3e83888/NCHax.x - Apache

* Add disambiguate heuristics for .x

* Add RPC to vendor/README.md

samples/Logos/NCHax.x

@@ -0,0 +1,57 @@
+#import <UIKit/UIKit.h>
+#import <BulletinBoard/BBSectionInfo.h>
+#import <UIKit/UIImage+Private.h>
+#import <version.h>
+
+static NSString *const kHBDPWeeAppIdentifier = @"ws.hbang.dailypaperweeapp";
+
+#pragma mark - Change section header and icon
+
+// courtesy of benno
+
+BOOL isDailyPaper = NO;
+
+%hook SBBulletinObserverViewController
+
+- (void)_addSection:(BBSectionInfo *)section toCategory:(NSInteger)category widget:(id)widget {
+	if ([section.sectionID isEqualToString:kHBDPWeeAppIdentifier]) {
+		isDailyPaper = YES;
+		%orig;
+		isDailyPaper = NO;
+	} else {
+		%orig;
+	}
+}
+
+%end
+
+%hook SBBulletinListSection
+
+- (void)setDisplayName:(NSString *)displayName {
+	%orig(isDailyPaper ? @"Current Wallpaper" : displayName);
+}
+
+- (void)setIconImage:(UIImage *)iconImage {
+	%orig(isDailyPaper ? [UIImage imageNamed:@"icon" inBundle:[NSBundle bundleWithPath:@"/Library/PreferenceBundles/DailyPaper.bundle"]] : iconImage);
+}
+
+%end
+
+#pragma mark - Enable by default
+
+%hook SBNotificationCenterDataProviderController
+
+- (NSArray *)_copyDefaultEnabledWidgetIDs {
+	NSArray *defaultWidgets = %orig;
+	return [[defaultWidgets arrayByAddingObject:kHBDPWeeAppIdentifier] copy];
+}
+
+%end
+
+#pragma mark - Constructor
+
+%ctor {
+	if (!IS_IOS_OR_NEWER(iOS_8_0)) {
+		%init;
+	}
+}