Reworked Lazarus.gitignore according to Lazarus Wiki

http://wiki.freepascal.org/File_extensions

Global/Lazarus.gitignore

-#ignore backup files
-backup/
-
-#ignore files generated by the compiler
-lib/
+# Lazarus compiler-generated binaries (safe to delete)
+*.exe
+*.dll
+*.so
+*.dylib
+*.lrs
+*.res
 *.compiled
+*.dbg
+*.ppu
 *.o
 *.or
-*.ppu
+*.a
 
-#ignore debug information files
-*.dbg
+# Lazarus autogenerated files (duplicated info)
+*.rst
+*.rsj
+*.lrt
 
-#exclude executable output in windows
-*.exe
+# Lazarus local files (user-specific info)
+*.lps
+
+# Lazarus backups and unit output folders.
+# These can be changed by user in Lazarus/project options.
+backup/
+*.bak
+lib/
+
+# Application bundle for Mac OS
+*.app/