CMake: Fix config.h: No such file or directory

Signed-off-by: Marc Lagrange <markocpc@gmail.com>

.gitignore

@@ -6,7 +6,7 @@ Makefile
 *.o
 .*.sw?
 wmfs
-config.h
+src/config.h
 CHANGELOG
 config.h
 #*

CMakeLists.txt

@@ -216,7 +216,7 @@ set(WMFS_SYSCONFDIR ${XDG_CONFIG_DIR}/${PROJECT_NAME})
 
 # Configure files
 set(wmfs_configure_files
-  config.h.in
+  src/config.h.in
   wmfs.1.txt.in)
 
 macro(a_configure_file file)