Fix CMake version info bad quoting (#501)

* Fix quote escaping in commit message

* This is a "Test
message"

* Update to latest cmake-git-version-tracking git_watcher cmake file

Listed permalink to make it easier to diff any future changes

cmake/git_watcher.cmake

@@ -1,5 +1,5 @@
 # git_watcher.cmake
-# https://raw.githubusercontent.com/andrew-hardin/cmake-git-version-tracking/master/git_watcher.cmake
+# https://github.com/andrew-hardin/cmake-git-version-tracking/blob/20c58d5d08bad70550d969b478943c962faa6264/git_watcher.cmake
 #
 # Released under the MIT License.
 # https://raw.githubusercontent.com/andrew-hardin/cmake-git-version-tracking/master/LICENSE
@@ -158,13 +158,16 @@ function(GetGitState _working_dir)
 
     RunGitCommand(show -s "--format=%s" ${object})
     if(exit_code EQUAL 0)
+        # Escape quotes
         string(REPLACE "\"" "\\\"" output "${output}")
         set(ENV{GIT_COMMIT_SUBJECT} "${output}")
     endif()
 
     RunGitCommand(show -s "--format=%b" ${object})
     if(exit_code EQUAL 0)
         if(output)
+            # Escape quotes
+            string(REPLACE "\"" "\\\"" output "${output}")
             # Escape line breaks in the commit message.
             string(REPLACE "\r\n" "\\r\\n\\\r\n" safe "${output}")
             if(safe STREQUAL output)
@@ -180,6 +183,14 @@ function(GetGitState _working_dir)
         set(ENV{GIT_COMMIT_BODY} "\"\"") # empty string.
     endif()
 
+    # Get output of git describe
+    RunGitCommand(describe --always ${object})
+    if(NOT exit_code EQUAL 0)
+        set(ENV{GIT_DESCRIBE} "unknown")
+    else()
+        set(ENV{GIT_DESCRIBE} "${output}")
+    endif()
+
     # >>>
     # 2. Additional git properties can be added here via the
     #    "execute_process()" command. Be sure to set them in