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/macros.h

@@ -0,0 +1,13 @@
+#define M_PI 3.14159265358979
+#define M_PIf 3.14159265358979F
+#define GL_FALSE 0
+#define GL_RGB 0x1907
+#define GL_RGBA 0x1908
+#define EOF (-1)
+#define UINT32_MAX 0xFFFFFFFFU
+#define INT64_MAX 0x7FFFFFFFFFFFFFFFLL
+#define MINUS_THREE -3
+#define true 1
+#define false 0
+
+#define A_PI M_PI