Fix typo in .gitignore

Change-Id: Ibecee87ffe3ec6990e36952488668b790a8e54eb
Reviewed-on: https://gerrit.libreoffice.org/16076Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Joren De Cuyper <jorendc@libreoffice.org>

.gitignore

@@ -9,7 +9,7 @@
 # As a rule of thumb:
 # File that are generated by configure or the build
 # but that are not deleted by make clean
-# can be listed here... These must be deleted by maek distclean
+# can be listed here... These must be deleted by make distclean
 #
 # Files that are generated by the build but deleted by make clean
 # should all be under workdir or instdir