Preprocessor directives can now appear in the argument list of function-like macro calls.

#pragma PP-tokens can now be macro replaced.
#include header names directly enclosed in <> are free of macro replacement.
Preprocess-only mode (-E) now outputs with #line as source info.
Moved testcases for #760 and #1357.
Added testcase for #1643.

test/val/bug760.c

@@ -0,0 +1,12 @@
+/* bug#760 - Error when using macros as pragma arguments */
+
+#include <stdlib.h>
+
+#define BANK "PRG0"
+
+#pragma rodata-name(push, BANK)
+
+int main(void)
+{
+    return EXIT_SUCCESS;
+}