Nano-typo in the automake manual

[Alfred M. Szmidt]

Here is a trivial patch to fix a nano-typo, scr vs. src.

===File ~/automake-scrdir-typo.diff=========================
2006-10-14  Alfred M. Szmidt  <address@hidden>

        * doc/automake.texi (Third-Party Makefiles): Fix typo.

--- doc/automake.texi   28 Aug 2006 18:04:24 +0200      1.150
+++ doc/automake.texi   14 Oct 2006 20:52:59 +0200      
@@ -9429,7 +9429,7 @@ live without this (actually, many Automa
 existing @file{Makefile}s to support address@hidden  Doing so does not
 necessarily require Automake, only Autoconf is needed (@pxref{Build
 Directories, , Build Directories, autoconf, The Autoconf Manual}).
-The necessary substitutions: @samp{@@scrdir@@}, @samp{@@top_srcdir@@},
+The necessary substitutions: @samp{@@srcdir@@}, @samp{@@top_srcdir@@},
 and @samp{@@top_builddir@@} are defined by @file{configure} when it
 processes a @file{Makefile} (@pxref{Preset Output Variables, , Preset
 Output Variables, autoconf, The Autoconf Manual}), they are not
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