Revert r283572 - [Driver] Make -print-libgcc-file-name print compiler-rt lib when used

Revert the -print-libgcc-file-name change as the new test fails
on Darwin. It needs to be updated to run the libgcc part only on systems
supporting that rtlib.

llvm-svn: 283586
diff --git a/clang/docs/CommandGuide/clang.rst b/clang/docs/CommandGuide/clang.rst
index c715449..14c8127 100644
--- a/clang/docs/CommandGuide/clang.rst
+++ b/clang/docs/CommandGuide/clang.rst
@@ -394,8 +394,7 @@
 
 .. option:: -print-libgcc-file-name
 
-  Print the library path for the currently used compiler runtime library
-  ("libgcc.a" or "libclang_rt.builtins.*.a").
+  Print the library path for "libgcc.a".
 
 .. option:: -print-prog-name=<name>