Set PDF search patch for ALT Linux

--- src/mainwindow.cpp

+++ src/mainwindow.cpp

@@ -6566,7 +6566,7 @@

     searchList << VYM_DOCDIR;

 #endif

     // default path in SUSE LINUX

-    searchList << "/usr/share/doc/packages/vym";

+    searchList << vymBaseDir.path() + "/doc";

 #endif

     searchList << "doc"; // relative path for easy testing in tarball