Move Clang importer test SDK to a toplevel dir test/Inputs where it can be

shared between Clang importer and IDE tests


Swift SVN r11292

test/Inputs/clang-importer-sdk/usr/include/objc_ext.h

@@ -0,0 +1,25 @@
+@import ObjectiveC;
+
+@interface B(Separate)
+- (id)method:(int)i separateExtMethod:(double)d;
+- (void)anotherCategoryMethod;
+@end
+
+@class RefedSub;
+
+@interface SuperRefsSub
+- takesSub:(RefedSub*)sub;
+- overridden;
+@end
+
+@interface RefedSub : SuperRefsSub
+- overridden;
+@end
+
+@protocol NSRuncing
+- (void)runce;
+@end
+
+@interface NSMince
+- (void)eatWith:(id <NSRuncing>)runcer;
+@end