[4.1] 09b9125 Install vtcp.h as well

[Federico G. Schwindt]

commit 09b9125567a24b1ac0b2648ffbb193473d24e769
Author: Federico G. Schwindt <fgsch at lodoss.net>
Date:   Sat Aug 1 09:23:40 2015 +0100

    Install vtcp.h as well
    
    Discussed with Martin.

diff --git a/include/Makefile.am b/include/Makefile.am
index 8d21912..7088579 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -58,6 +58,7 @@ nobase_pkginclude_HEADERS += \
 	vsa.h \
 	vsb.h \
 	vsha256.h \
+	vtcp.h \
 	vtim.h
 
 # Private headers