patch 8.0.0796: no coverage on Travis with clang

Problem:    No coverage on Travis with clang.
Solution:   Use a specific coveralls version. (Ozaki Kiichi, closes #1888)
diff --git a/.travis.yml b/.travis.yml
index a6db9e7..17f0418 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,7 +30,6 @@
 # instead of a 2*2*8 matrix (2*os + 2*compiler + 8*env),
 # exclude some builds on mac os x and linux
 # linux: 2*compiler + 5*env + mac: 2*compiler + 2*env
-# Note: coverage currently does not work with clang, "setup.py install for cryptography" fails
 matrix:
   exclude:
     - os: osx
@@ -53,10 +52,6 @@
             "CONFOPT='--enable-perlinterp --enable-pythoninterp --enable-rubyinterp --enable-luainterp'"
     - os: linux
       compiler: clang
-      env: BUILD=yes TEST=scripttests COVERAGE=yes CFLAGS=--coverage LDFLAGS=--coverage FEATURES=huge SHADOWOPT= SRCDIR=./src CHECK_AUTOCONF=no
-           "CONFOPT='--enable-perlinterp --enable-pythoninterp --enable-python3interp --enable-rubyinterp --enable-luainterp'"
-    - os: linux
-      compiler: clang
       env: BUILD=no TEST=unittests COVERAGE=yes CFLAGS=--coverage LDFLAGS=--coverage FEATURES=huge SHADOWOPT= SRCDIR=./src CHECK_AUTOCONF=yes
     - os: linux
       compiler: clang
@@ -82,7 +77,7 @@
       - cscope
 
 before_install:
-  - if [ "$COVERAGE" = "yes" ]; then pip install --user cpp-coveralls; fi
+  - if [ "$COVERAGE" = "yes" ]; then pip install --user cpp-coveralls==0.3.12; fi
     # needed for https support for coveralls
     # building cffi only works with gcc, not with clang
   - if [ "$COVERAGE" = "yes" ]; then CC=gcc pip install --user pyopenssl ndg-httpsclient pyasn1; fi
diff --git a/src/version.c b/src/version.c
index 49d553f..9ca8700 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    796,
+/**/
     795,
 /**/
     794,