Add patch to fix autogen with empty files (bug #1551147)

cmake-automoc.patch

@@ -0,0 +1,14 @@
+diff -up cmake-3.10.2/Source/cmQtAutoGenerators.cxx.automoc cmake-3.10.2/Source/cmQtAutoGenerators.cxx
+--- cmake-3.10.2/Source/cmQtAutoGenerators.cxx.automoc	2018-01-18 07:48:42.000000000 -0700
++++ cmake-3.10.2/Source/cmQtAutoGenerators.cxx	2018-03-08 21:09:50.451726324 -0700
+@@ -80,8 +80,8 @@ static bool ReadFile(std::string& conten
+     std::size_t const length = cmSystemTools::FileLength(filename);
+     cmsys::ifstream ifs(filename.c_str(), (std::ios::in | std::ios::binary));
+     if (ifs) {
+-      content.resize(length);
+-      ifs.read(&content.front(), content.size());
++      content.reserve(length);
++      content.assign(std::istreambuf_iterator<char>{ifs}, {});
+       if (ifs) {
+         success = true;
+       } else {

cmake.spec

@@ -96,6 +96,9 @@ Patch102:        https://gitlab.kitware.com/cmake/cmake/merge_requests/1785.patc
 # Add dl to CMAKE_DL_LIBS on MINGW
 # https://gitlab.kitware.com/cmake/cmake/issues/17600
 Patch103:         cmake-mingw-dl.patch
+# Fix autogen crash with empty files
+# https://bugzilla.redhat.com/show_bug.cgi?id=1551147
+Patch104:       cmake-automoc.patch
 
 # Patch for renaming on EPEL
 %if 0%{?name_suffix:1}
@@ -501,6 +504,9 @@ update-mime-database %{?fedora:-n} %{_datadir}/mime &> /dev/null || :
 
 
 %changelog
+* Thu Mar 8 2018 Orion Poplawski <orion@nwra.com> - 3.10.2-4
+- Add patch to fix autogen with empty files (bug #1551147)
+
 * Thu Mar 08 2018 Rex Dieter <rdieter@fedoraproject.org> - 3.10.2-3
 - better Qt dependencies