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