Utilities: Update PackChk 1.3.81 and SVDConv 3.3.25.

Change-Id: I89c58b5e161ba56ce25111b3200438f21e17ed9c
diff --git a/.gitattributes b/.gitattributes
index b6f7ab8..939926f 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -18,3 +18,4 @@
 *.a filter=lfs diff=lfs merge=lfs -text
 *.lib filter=lfs diff=lfs merge=lfs -text
 *.exe filter=lfs diff=lfs merge=lfs -text
+CMSIS/Utilities/Linux-gcc-*/* filter=lfs diff=lfs merge=lfs -text
\ No newline at end of file