[RFA/doc] Fix description of %(cc1)

[Daniel Jacobowitz]

A little while ago I was helping a user modify their spec file.  We
both got confused by the behavior of the "cc1" spec: it's not just
passed to cc1.  It's passed when preprocessing or compiling every
language (well, except for Ada, which AFAICT does not use specs).

Is this OK?

-- 
Daniel Jacobowitz
CodeSourcery

2010-03-09  Daniel Jacobowitz  <dan@codesourcery.com>

	* invoke.texi (Spec Files): Clarify description of %(cc1).

Index: invoke.texi
===================================================================
--- invoke.texi	(revision 156497)
+++ invoke.texi	(working copy)
@@ -9017,7 +9017,7 @@ targets can also add their own spec stri
 asm          Options to pass to the assembler
 asm_final    Options to pass to the assembler post-processor
 cpp          Options to pass to the C preprocessor
-cc1          Options to pass to the C compiler
+cc1          Options to pass to the preprocessor or compiler
 cc1plus      Options to pass to the C++ compiler
 endfile      Object files to include at the end of the link
 link         Options to pass to the linker