Comptime.cmake: escape \backslashes and "quotes" in git subject line

cmake/Comptime.cmake

@@ -9,9 +9,11 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Mo
 include(GitUtilities)
 
 git_current_branch(SRB2_COMP_BRANCH)
-git_summary(SRB2_COMP_REVISION)
 git_working_tree_dirty(SRB2_COMP_UNCOMMITTED)
 
+git_summary(revision)
+string(REGEX REPLACE "([\"\\])" "\\\\\\1" SRB2_COMP_REVISION "${revision}")
+
 if("${CMAKE_BUILD_TYPE}" STREQUAL "")
 	set(CMAKE_BUILD_TYPE None)
 endif()