[common] Enable git lfs for known binary formats

.gitattributes

@@ -1,6 +1,5 @@
 # Commit everything as LF, but on Windows checkout with CRLF.
 * text=auto
-
 # Git tries to detect if a file is a text file, but we can tell it
 # explicitly which files are text and which binaries.
   # Cygwin (?) man files
@@ -34,11 +33,10 @@ LICENSE		text
 NEWS		text
 README		text
 TODO		text
-
 *.ico		binary
-*.jpg		binary
-*.pdf		binary
-*.png		binary
+*.jpg filter=lfs diff=lfs merge=lfs -text
+*.png filter=lfs diff=lfs merge=lfs -text
 *.pyc		binary
-*.so		binary
-
+*.so filter=lfs diff=lfs merge=lfs -text
+*.dll filter=lfs diff=lfs merge=lfs -text
+*.lib filter=lfs diff=lfs merge=lfs -text

BUILDING.md

@@ -4,6 +4,7 @@
 
 You will need:
 - [Git](https://git-scm.com/)
+- [Git LFS](https://git-lfs.com/)
 - A C++ compiler (MSVC on Windows, GCC on Linux; Clang support is planned)
 - A build system (Make, Visual Studio, Ninja, etc.)
 - [CMake](https://cmake.org/)
@@ -21,6 +22,9 @@ On Linux you will also need:
 
 ## Building
 
+### Install Git LFS
+- https://docs.github.com/en/repositories/working-with-files/managing-large-files/installing-git-large-file-storage
+
 ### Clone the repo
 
 ```bash